From 79a9cada15cbc2e076e704933ef593869ee26a67 Mon Sep 17 00:00:00 2001 From: Romain Perier Date: Fri, 14 Dec 2018 10:55:05 +0100 Subject: [PATCH] [rt] Update to 4.19.8-rt6 --- debian/changelog | 2 +- debian/config/defines | 2 +- ...M-at91-add-TCB-registers-definitions.patch | 2 +- ...d-zone-lock-while-freeing-pages-from.patch | 2 +- ...d-zone-lock-while-freeing-pages-from.patch | 2 +- ...ers-Add-a-new-driver-for-the-Atmel-A.patch | 2 +- ...ers-timer-atmel-tcb-add-clockevent-d.patch | 2 +- ...B-change-list_lock-to-raw_spinlock_t.patch | 12 ++-- ...drivers-atmel-pit-make-option-silent.patch | 2 +- ...ving-back-empty-slubs-to-IRQ-enabled.patch | 2 +- ...at91-Implement-clocksource-selection.patch | 2 +- ...onfigs-at91-use-new-TCB-timer-driver.patch | 2 +- .../0007-ARM-configs-at91-unselect-PIT.patch | 2 +- ...n-translation-section-permission-fau.patch | 2 +- ...mbus-include-header-for-get_irq_regs.patch | 2 +- ...xpedited-GP-parallelization-cleverne.patch | 2 +- ...intk-drop-the-logbuf_lock-more-often.patch | 10 ++-- ...wngrade-preempt_disable-d-region-to-.patch | 2 +- ...-replace-seqcount_t-with-a-seqlock_t.patch | 2 +- debian/patches-rt/add_migrate_disable.patch | 4 +- ...-a-locallock-instead-preempt_disable.patch | 2 +- .../arch-arm64-Add-lazy-preempt-support.patch | 2 +- .../arm-convert-boot-lock-to-raw.patch | 2 +- .../arm-disable-NEON-in-kernel-mode.patch | 2 +- .../arm-enable-highmem-for-rt.patch | 2 +- .../arm-highmem-flush-tlb-on-unmap.patch | 2 +- ...arm-include-definition-for-cpumask_t.patch | 2 +- ...probe-replace-patch_lock-to-raw-lock.patch | 2 +- .../patches-rt/arm-preempt-lazy-support.patch | 2 +- .../patches-rt/arm-unwind-use_raw_lock.patch | 2 +- ...e_layout-before-altenates-are-applie.patch | 2 +- ...-preemp_disable-in-addition-to-local.patch | 2 +- .../at91_dont_enable_disable_clock.patch | 2 +- ...e-blk_queue_usage_counter_release-in.patch | 8 +-- ...k-mq-don-t-complete-requests-via-IPI.patch | 2 +- .../block-mq-drop-preempt-disable.patch | 2 +- .../patches-rt/block-mq-use-cpu_light.patch | 2 +- debian/patches-rt/block-use-cpu-chill.patch | 2 +- ...irqsave-in-cgroup_rstat_flush_locked.patch | 2 +- ...roups-use-simple-wait-in-css_release.patch | 2 +- ...source-tclib-allow-higher-clockrates.patch | 2 +- .../completion-use-simple-wait-queues.patch | 6 +- .../cond-resched-lock-rt-tweak.patch | 2 +- ...c-Protect-send_msg-with-a-local-lock.patch | 2 +- .../cpu-hotplug--Implement-CPU-pinning.patch | 14 ++--- ...rop-K8-s-driver-from-beeing-selected.patch | 2 +- .../cpumask-disable-offstack-on-rt.patch | 4 +- ...vert-callback_lock-to-raw_spinlock_t.patch | 2 +- ...-preempt-disabled-regions-more-algos.patch | 2 +- ...m-qi-simplify-CGR-allocation-freeing.patch | 2 +- ...d-a-lock-instead-preempt_disable-loc.patch | 2 +- ...ypto-limit-more-FPU-enabled-sections.patch | 2 +- ...-serialize-RT-percpu-scratch-buffer-.patch | 2 +- debian/patches-rt/debugobjects-rt.patch | 2 +- ...rq-remove-BUG_ON-irqs_disabled-check.patch | 2 +- ...am-Replace-bit-spinlocks-with-rtmute.patch | 2 +- .../drivers-tty-fix-omap-lock-crap.patch | 2 +- ...rivers-tty-pl011-irq-disable-madness.patch | 2 +- ...-t-disable-preemption-in-zcomp_strea.patch | 2 +- ...-zcomp_stream_get-smp_processor_id-u.patch | 2 +- .../drm-i915-disable-tracing-on-RT.patch | 41 ++++++++++++++ ...rq()_in_intel_pipe_update_startend().patch | 2 +- ...disableenable_rt()_where_recommended.patch | 2 +- debian/patches-rt/efi-Allow-efi-runtime.patch | 2 +- .../efi-Disable-runtime-services-on-RT.patch | 2 +- .../patches-rt/epoll-use-get-cpu-light.patch | 2 +- .../fs-aio-simple-simple-work.patch | 2 +- ...-back-explicit-INIT_HLIST_BL_HEAD-in.patch | 2 +- ...e-preemption-on-i_dir_seq-s-write-si.patch | 2 +- ...cache-use-cpu-chill-in-trylock-loops.patch | 2 +- ...use-swait_queue-instead-of-waitqueue.patch | 2 +- .../fs-jbd-replace-bh_state-lock.patch | 2 +- ...-nfs-turn-rmdir_sem-into-a-semaphore.patch | 2 +- .../fs-replace-bh_uptodate_lock-for-rt.patch | 2 +- ...lize-cookie-hash-table-raw-spinlocks.patch | 2 +- .../ftrace-Fix-trace-header-alignment.patch | 2 +- .../ftrace-migrate-disable-tracing.patch | 2 +- ...k-unlock-symetry-versus-pi_lock-and-.patch | 2 +- debian/patches-rt/futex-requeue-pi-fix.patch | 2 +- ...-migrate_disable-enable-in-different.patch | 2 +- .../genirq-disable-irqpoll-on-rt.patch | 2 +- ...voke-the-affinity-callback-via-a-wor.patch | 2 +- .../patches-rt/genirq-force-threading.patch | 2 +- ...-irq_set_irqchip_state-documentation.patch | 4 +- ...duct-tape-RT-rwlock-usage-for-non-RT.patch | 18 +++--- .../hotplug-light-get-online-cpus.patch | 8 +-- ...-schedule_work-call-to-helper-thread.patch | 2 +- ...-by-default-into-the-softirq-context.patch | 4 +- ...ate-hrtimer_init-hrtimer_init_sleepe.patch | 4 +- ...te-change-before-hrtimer_cancel-in-d.patch | 45 +++++++++++++++ .../hrtimers-prepare-full-preemption.patch | 2 +- ...irq-processing-in-irq-thread-context.patch | 2 +- ...ts-Move-pending-table-allocation-to-.patch | 2 +- ...-push_most_work_into_softirq_context.patch | 2 +- debian/patches-rt/jump-label-rt.patch | 2 +- .../kconfig-disable-a-few-options-rt.patch | 2 +- .../patches-rt/kconfig-preempt-rt-full.patch | 2 +- ...n-t-try-to-print-from-IRQ-NMI-region.patch | 6 +- ...vide-a-pointer-to-the-valid-CPU-mask.patch | 16 +++--- ...e-stack-kprobe-clean-up-to-__put_tas.patch | 2 +- debian/patches-rt/kgb-serial-hackaround.patch | 4 +- ...-convert-worker-lock-to-raw-spinlock.patch | 2 +- ...ds-trigger-disable-CPU-trigger-on-RT.patch | 2 +- .../list_bl-fixup-bogus-lockdep-warning.patch | 2 +- ..._bl.h-make-list-head-locking-RT-safe.patch | 2 +- ...provide-get-put-_locked_ptr-variants.patch | 2 +- debian/patches-rt/localversion.patch | 4 +- .../lockdep-disable-self-test.patch | 2 +- .../lockdep-no-softirq-accounting-on-rt.patch | 2 +- ...-fix-warnings-due-to-missing-PREEMPT.patch | 2 +- ...ardirq-context-test-for-raw-spinlock.patch | 2 +- ...eck-for-__LINUX_SPINLOCK_TYPES_H-on-.patch | 2 +- ...ure-Do-NOT-include-rwlock.h-directly.patch | 2 +- ...-fix-deadlock-in-device-mapper-block.patch | 2 +- ...re-init-the-wait_lock-in-rt_mutex_in.patch | 2 +- debian/patches-rt/md-disable-bcache.patch | 2 +- .../md-raid5-percpu-handling-rt-aware.patch | 2 +- .../mips-disable-highmem-on-rt.patch | 2 +- .../mm-convert-swap-to-percpu-locked.patch | 4 +- debian/patches-rt/mm-disable-sloub-rt.patch | 2 +- debian/patches-rt/mm-enable-slub.patch | 2 +- ...ake-quarantine_lock-a-raw_spinlock_t.patch | 2 +- .../patches-rt/mm-make-vmstat-rt-aware.patch | 2 +- ...n-t-call-schedule_work_on-in-preempt.patch | 2 +- .../mm-memcontrol-do_not_disable_irq.patch | 2 +- ...page_alloc-rt-friendly-per-cpu-pages.patch | 6 +- ...m-perform-lru_add_drain_all-remotely.patch | 2 +- .../mm-protect-activate-switch-mm.patch | 2 +- .../mm-rt-kmap-atomic-scheduling.patch | 12 ++-- ...-scatterlist-dont-disable-irqs-on-RT.patch | 2 +- .../mm-vmalloc-use-get-cpu-light.patch | 2 +- ...oc_copy_with_get_cpu_var_and_locking.patch | 2 +- debian/patches-rt/mutex-no-spin-on-rt.patch | 2 +- ...schedule_irqoff-disable-interrupts-o.patch | 6 +- ...Qdisc-use-a-seqlock-instead-seqcount.patch | 2 +- .../net-add-a-lock-around-icmp_sk.patch | 2 +- ...-missing-serialization-in-ip_send_un.patch | 2 +- ...al-irq-disable-alloc-atomic-headache.patch | 2 +- ...-users-of-napi_alloc_cache-against-r.patch | 2 +- ...-use-local_bh_disable-in-netif_rx_ni.patch | 2 +- ...ake-qdisc-s-busylock-in-__dev_xmit_s.patch | 2 +- ...ble-xt-write-recseq-begin-rt-fallout.patch | 2 +- .../net-make-devnet_rename_seq-a-mutex.patch | 2 +- ...recursion-to-per-task-variable-on-RT.patch | 6 +- ...y-to-delegate-processing-a-softirq-t.patch | 4 +- ...activate_many-use-msleep-1-instead-o.patch | 2 +- debian/patches-rt/net-use-cpu-chill.patch | 2 +- .../net_disable_NET_RX_BUSY_POLL.patch | 2 +- ...-phandle-cache-outside-of-the-devtre.patch | 4 +- debian/patches-rt/oleg-signal-rt-fix.patch | 2 +- .../panic-disable-random-on-rt.patch | 2 +- ...ce-rcu-bh-qs-where-safe-from-softirq.patch | 2 +- ...ec-Don-t-use-completion-s-wait-queue.patch | 2 +- ...de-irqflags.h-for-raw_local_irq_save.patch | 2 +- .../patches-rt/peter_zijlstra-frob-rcu.patch | 2 +- .../patches-rt/peterz-percpu-rwsem-rt.patch | 2 +- .../patches-rt/pid.h-include-atomic.h.patch | 2 +- ...Use-raw-spinlock-for-RT-compatibilit.patch | 2 +- ...timers-thread-posix-cpu-timers-on-rt.patch | 2 +- .../power-disable-highmem-on-rt.patch | 2 +- .../power-use-generic-rwsem-on-rt.patch | 2 +- ...ble-in-kernel-MPIC-emulation-for-PRE.patch | 2 +- .../powerpc-preempt-lazy-support.patch | 2 +- debian/patches-rt/preempt-lazy-support.patch | 20 +++---- .../patches-rt/preempt-nort-rt-variants.patch | 2 +- ...27-boot-param-to-help-with-debugging.patch | 2 +- debian/patches-rt/printk-kill.patch | 6 +- debian/patches-rt/printk-rt-aware.patch | 16 +++--- ...ace-fix-ptrace-vs-tasklist_lock-race.patch | 4 +- .../radix-tree-use-local-locks.patch | 2 +- ...dom-avoid-preempt_disable-ed-section.patch | 2 +- .../random-make-it-work-on-rt.patch | 4 +- ...nate-softirq-processing-from-rcutree.patch | 8 +-- .../rcu-disable-rcu-fast-no-hz-on-rt.patch | 2 +- ..._normal_after_boot-by-default-for-RT.patch | 2 +- .../rcu-make-RCU_BOOST-default-on-RT.patch | 2 +- ...merge-rcu-bh-into-rcu-preempt-for-rt.patch | 16 +++--- ...l-arm-coredump-fails-for-cpu-3e-3d-4.patch | 2 +- ...ease-the-nr-of-migratory-tasks-when-.patch | 8 +-- .../patches-rt/rt-introduce-cpu-chill.patch | 2 +- debian/patches-rt/rt-local-irq-lock.patch | 2 +- .../patches-rt/rt-preempt-base-config.patch | 2 +- debian/patches-rt/rt-serial-warn-fix.patch | 2 +- .../rtmutex-Make-lock_killable-work.patch | 2 +- ...tex-Provide-rt_mutex_slowlock_locked.patch | 2 +- ...utex-implementation-based-on-rtmutex.patch | 2 +- ...lock-implementation-based-on-rtmutex.patch | 2 +- ...wsem-implementation-based-on-rtmutex.patch | 2 +- ...tex-add-sleeping-lock-implementation.patch | 2 +- ...utex-add-ww_mutex-addon-for-mutex-rt.patch | 2 +- ...mutex-annotate-sleeping-lock-context.patch | 6 +- .../rtmutex-avoid-include-hell.patch | 2 +- ...ockdep-less-version-of-rt_mutex-s-lo.patch | 2 +- .../patches-rt/rtmutex-futex-prepare-rt.patch | 2 +- debian/patches-rt/rtmutex-lock-killable.patch | 2 +- .../rtmutex-trylock-is-okay-on-RT.patch | 2 +- .../rtmutex-wire-up-RT-s-locking.patch | 2 +- .../patches-rt/rtmutex_dont_include_rcu.patch | 2 +- ...ed-user-tasks-to-be-awakened-to-the-.patch | 2 +- debian/patches-rt/sched-delay-put-task.patch | 4 +- .../sched-disable-rt-group-sched-on-rt.patch | 2 +- .../patches-rt/sched-disable-ttwu-queue.patch | 2 +- .../patches-rt/sched-limit-nr-migrate.patch | 2 +- ...might-sleep-do-not-account-rcu-depth.patch | 4 +- ...sable-Add-export_symbol_gpl-for-__mi.patch | 2 +- ...sable-fallback-to-preempt_disable-in.patch | 6 +- debian/patches-rt/sched-mmdrop-delayed.patch | 4 +- debian/patches-rt/sched-rt-mutex-wakeup.patch | 6 +- ...Only-wake-up-idle-workers-if-not-blo.patch | 2 +- debian/patches-rt/scsi-fcoe-rt-aware.patch | 2 +- .../seqlock-prevent-rt-starvation.patch | 2 +- debian/patches-rt/series | 4 ++ .../signal-revert-ptrace-preempt-magic.patch | 2 +- ...t-tasks-to-cache-one-sigqueue-struct.patch | 2 +- debian/patches-rt/skbufhead-raw-lock.patch | 14 ++--- .../slub-disable-SLUB_CPU_PARTIAL.patch | 2 +- .../slub-enable-irqs-for-no-wait.patch | 2 +- ...oftirq-disable-softirq-stacks-for-rt.patch | 2 +- .../patches-rt/softirq-preempt-fix-3-re.patch | 8 +-- debian/patches-rt/softirq-split-locks.patch | 6 +- ...plit-timer-softirqs-out-of-ksoftirqd.patch | 2 +- .../spinlock-types-separate-raw.patch | 2 +- ...e-of-local-lock-in-multi_cpu-decompr.patch | 2 +- ...place-local_irqsave-with-a-locallock.patch | 2 +- ...-use-cpu_online-instead-custom-check.patch | 6 +- ...vc_xprt_do_enqueue-use-get_cpu_light.patch | 2 +- debian/patches-rt/sysfs-realtime-entry.patch | 2 +- ...-from-going-into-infinite-spin-in-rt.patch | 2 +- ...rmal-Defer-thermal-wakups-to-threads.patch | 2 +- ...id-schedule_work-with-interrupts-dis.patch | 2 +- .../timekeeping-split-jiffies-lock.patch | 2 +- .../timers-prepare-for-full-preemption.patch | 2 +- .../tpm_tis-fix-stall-after-iowrite-s.patch | 2 +- ...0-don-t-take-the-trylock-during-oops.patch | 2 +- ...al-pl011-warning-about-uninitialized.patch | 2 +- ...ove-preemption-disabling-in-netif_rx.patch | 2 +- ...o-not-disable-interrupts-in-giveback.patch | 2 +- .../patches-rt/wait.h-include-atomic.h.patch | 2 +- ...t-deferral-of-watchdogd-wakeup-on-RT.patch | 2 +- ...rk-around-irqsafe-timer-optimization.patch | 2 +- ...mple-Simple-work-queue-implemenation.patch | 2 +- ...-a-shit-statement-in-SWORK_EVENT_PEN.patch | 2 +- .../workqueue-distangle-from-rq-lock.patch | 2 +- .../workqueue-prevent-deadlock-stall.patch | 2 +- .../patches-rt/workqueue-use-locallock.patch | 2 +- debian/patches-rt/workqueue-use-rcu.patch | 2 +- ...ypto-reduce-preempt-disabled-regions.patch | 2 +- ...fi-drop-task_lock-from-efi_switch_mm.patch | 2 +- ...e-preemption-around-local_bh_disable.patch | 32 +++++++++++ ...highmem-add-a-already-used-pte-check.patch | 2 +- ...-let-setaffinity-unmask-threaded-EOI.patch | 2 +- .../x86-kvm-require-const-tsc-for-rt.patch | 2 +- ...le-preemption-__split_large_page-aft.patch | 55 +++++++++++++++++++ debian/patches-rt/x86-preempt-lazy.patch | 34 ++++++------ ...ignal-delay-calling-signals-on-32bit.patch | 2 +- .../x86-stackprot-no-random-on-rt.patch | 2 +- .../x86-use-gen-rwsem-spinlocks-rt.patch | 2 +- 257 files changed, 561 insertions(+), 384 deletions(-) create mode 100644 debian/patches-rt/drm-i915-disable-tracing-on-RT.patch create mode 100644 debian/patches-rt/hrtimer-move-state-change-before-hrtimer_cancel-in-d.patch create mode 100644 debian/patches-rt/x86-fpu-Disable-preemption-around-local_bh_disable.patch create mode 100644 debian/patches-rt/x86-mm-pat-disable-preemption-__split_large_page-aft.patch diff --git a/debian/changelog b/debian/changelog index 0e3867a99..c22506c1c 100644 --- a/debian/changelog +++ b/debian/changelog @@ -30,7 +30,7 @@ linux (4.19.9-1) UNRELEASED; urgency=medium [ Romain Perier ] * [x86] Enable support for error detection and correction on the Intel Pondicherry2 Integrated Memory Controller (Closes: #914946) - * Update to 4.19.5-rt4 + * [rt] Update to 4.19.8-rt6 [ Uwe Kleine-König ] * Enable usb support for ATH10K (Closes: #915083) diff --git a/debian/config/defines b/debian/config/defines index 07ccce92d..fba31eb75 100644 --- a/debian/config/defines +++ b/debian/config/defines @@ -122,7 +122,7 @@ debug-info: true signed-code: false [featureset-rt_base] -enabled: false +enabled: true [description] part-long-up: This kernel is not suitable for SMP (multi-processor, diff --git a/debian/patches-rt/0001-ARM-at91-add-TCB-registers-definitions.patch b/debian/patches-rt/0001-ARM-at91-add-TCB-registers-definitions.patch index fa713cd23..977adab85 100644 --- a/debian/patches-rt/0001-ARM-at91-add-TCB-registers-definitions.patch +++ b/debian/patches-rt/0001-ARM-at91-add-TCB-registers-definitions.patch @@ -1,7 +1,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:18 +0200 Subject: [PATCH 1/7] ARM: at91: add TCB registers definitions -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Add registers and bits definitions for the timer counter blocks found on Atmel ARM SoCs. diff --git a/debian/patches-rt/0001-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch b/debian/patches-rt/0001-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch index 58994b94e..ffbfa439b 100644 --- a/debian/patches-rt/0001-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch +++ b/debian/patches-rt/0001-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch @@ -2,7 +2,7 @@ From: Peter Zijlstra Date: Mon, 28 May 2018 15:24:20 +0200 Subject: [PATCH 1/4] Split IRQ-off and zone->lock while freeing pages from PCP list #1 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Split the IRQ-off section while accessing the PCP list from zone->lock while freeing pages. diff --git a/debian/patches-rt/0002-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch b/debian/patches-rt/0002-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch index 2823c541f..55bcd8712 100644 --- a/debian/patches-rt/0002-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch +++ b/debian/patches-rt/0002-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch @@ -2,7 +2,7 @@ From: Peter Zijlstra Date: Mon, 28 May 2018 15:24:21 +0200 Subject: [PATCH 2/4] Split IRQ-off and zone->lock while freeing pages from PCP list #2 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Split the IRQ-off section while accessing the PCP list from zone->lock while freeing pages. diff --git a/debian/patches-rt/0002-clocksource-drivers-Add-a-new-driver-for-the-Atmel-A.patch b/debian/patches-rt/0002-clocksource-drivers-Add-a-new-driver-for-the-Atmel-A.patch index 8474ade49..6c59f55bb 100644 --- a/debian/patches-rt/0002-clocksource-drivers-Add-a-new-driver-for-the-Atmel-A.patch +++ b/debian/patches-rt/0002-clocksource-drivers-Add-a-new-driver-for-the-Atmel-A.patch @@ -2,7 +2,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:19 +0200 Subject: [PATCH 2/7] clocksource/drivers: Add a new driver for the Atmel ARM TC blocks -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Add a driver for the Atmel Timer Counter Blocks. This driver provides a clocksource and two clockevent devices. diff --git a/debian/patches-rt/0003-clocksource-drivers-timer-atmel-tcb-add-clockevent-d.patch b/debian/patches-rt/0003-clocksource-drivers-timer-atmel-tcb-add-clockevent-d.patch index f1ccbafe2..50cebc1c8 100644 --- a/debian/patches-rt/0003-clocksource-drivers-timer-atmel-tcb-add-clockevent-d.patch +++ b/debian/patches-rt/0003-clocksource-drivers-timer-atmel-tcb-add-clockevent-d.patch @@ -2,7 +2,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:20 +0200 Subject: [PATCH 3/7] clocksource/drivers: timer-atmel-tcb: add clockevent device on separate channel -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Add an other clockevent device that uses a separate TCB channel when available. diff --git a/debian/patches-rt/0003-mm-SLxB-change-list_lock-to-raw_spinlock_t.patch b/debian/patches-rt/0003-mm-SLxB-change-list_lock-to-raw_spinlock_t.patch index abec8f408..3e177149d 100644 --- a/debian/patches-rt/0003-mm-SLxB-change-list_lock-to-raw_spinlock_t.patch +++ b/debian/patches-rt/0003-mm-SLxB-change-list_lock-to-raw_spinlock_t.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Mon, 28 May 2018 15:24:22 +0200 Subject: [PATCH 3/4] mm/SLxB: change list_lock to raw_spinlock_t -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The list_lock is used with used with IRQs off on RT. Make it a raw_spinlock_t otherwise the interrupts won't be disabled on -RT. The locking rules remain @@ -324,7 +324,7 @@ Signed-off-by: Sebastian Andrzej Siewior slabs_destroy(cachep, &list); ac->avail -= batchcount; memmove(ac->entry, &(ac->entry[batchcount]), sizeof(void *)*ac->avail); -@@ -3887,9 +3887,9 @@ static int __do_tune_cpucache(struct kme +@@ -3891,9 +3891,9 @@ static int __do_tune_cpucache(struct kme node = cpu_to_mem(cpu); n = get_node(cachep, node); @@ -336,7 +336,7 @@ Signed-off-by: Sebastian Andrzej Siewior slabs_destroy(cachep, &list); } free_percpu(prev); -@@ -4014,9 +4014,9 @@ static void drain_array(struct kmem_cach +@@ -4018,9 +4018,9 @@ static void drain_array(struct kmem_cach return; } @@ -348,7 +348,7 @@ Signed-off-by: Sebastian Andrzej Siewior slabs_destroy(cachep, &list); } -@@ -4100,7 +4100,7 @@ void get_slabinfo(struct kmem_cache *cac +@@ -4104,7 +4104,7 @@ void get_slabinfo(struct kmem_cache *cac for_each_kmem_cache_node(cachep, node, n) { check_irq_on(); @@ -357,7 +357,7 @@ Signed-off-by: Sebastian Andrzej Siewior total_slabs += n->total_slabs; free_slabs += n->free_slabs; -@@ -4109,7 +4109,7 @@ void get_slabinfo(struct kmem_cache *cac +@@ -4113,7 +4113,7 @@ void get_slabinfo(struct kmem_cache *cac if (n->shared) shared_avail += n->shared->avail; @@ -366,7 +366,7 @@ Signed-off-by: Sebastian Andrzej Siewior } num_objs = total_slabs * cachep->num; active_slabs = total_slabs - free_slabs; -@@ -4324,13 +4324,13 @@ static int leaks_show(struct seq_file *m +@@ -4328,13 +4328,13 @@ static int leaks_show(struct seq_file *m for_each_kmem_cache_node(cachep, node, n) { check_irq_on(); diff --git a/debian/patches-rt/0004-clocksource-drivers-atmel-pit-make-option-silent.patch b/debian/patches-rt/0004-clocksource-drivers-atmel-pit-make-option-silent.patch index 9f6c656a9..67d533e99 100644 --- a/debian/patches-rt/0004-clocksource-drivers-atmel-pit-make-option-silent.patch +++ b/debian/patches-rt/0004-clocksource-drivers-atmel-pit-make-option-silent.patch @@ -1,7 +1,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:21 +0200 Subject: [PATCH 4/7] clocksource/drivers: atmel-pit: make option silent -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz To conform with the other option, make the ATMEL_PIT option silent so it can be selected from the platform diff --git a/debian/patches-rt/0004-mm-SLUB-delay-giving-back-empty-slubs-to-IRQ-enabled.patch b/debian/patches-rt/0004-mm-SLUB-delay-giving-back-empty-slubs-to-IRQ-enabled.patch index fd21afdf8..a392342d0 100644 --- a/debian/patches-rt/0004-mm-SLUB-delay-giving-back-empty-slubs-to-IRQ-enabled.patch +++ b/debian/patches-rt/0004-mm-SLUB-delay-giving-back-empty-slubs-to-IRQ-enabled.patch @@ -2,7 +2,7 @@ From: Thomas Gleixner Date: Thu, 21 Jun 2018 17:29:19 +0200 Subject: [PATCH 4/4] mm/SLUB: delay giving back empty slubs to IRQ enabled regions -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz __free_slab() is invoked with disabled interrupts which increases the irq-off time while __free_pages() is doing the work. diff --git a/debian/patches-rt/0005-ARM-at91-Implement-clocksource-selection.patch b/debian/patches-rt/0005-ARM-at91-Implement-clocksource-selection.patch index 58a8bf831..a3e5fad0c 100644 --- a/debian/patches-rt/0005-ARM-at91-Implement-clocksource-selection.patch +++ b/debian/patches-rt/0005-ARM-at91-Implement-clocksource-selection.patch @@ -1,7 +1,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:22 +0200 Subject: [PATCH 5/7] ARM: at91: Implement clocksource selection -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Allow selecting and unselecting the PIT clocksource driver so it doesn't have to be compile when unused. diff --git a/debian/patches-rt/0006-ARM-configs-at91-use-new-TCB-timer-driver.patch b/debian/patches-rt/0006-ARM-configs-at91-use-new-TCB-timer-driver.patch index 67c42af02..f8993e031 100644 --- a/debian/patches-rt/0006-ARM-configs-at91-use-new-TCB-timer-driver.patch +++ b/debian/patches-rt/0006-ARM-configs-at91-use-new-TCB-timer-driver.patch @@ -1,7 +1,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:23 +0200 Subject: [PATCH 6/7] ARM: configs: at91: use new TCB timer driver -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Unselecting ATMEL_TCLIB switches the TCB timer driver from tcb_clksrc to timer-atmel-tcb. diff --git a/debian/patches-rt/0007-ARM-configs-at91-unselect-PIT.patch b/debian/patches-rt/0007-ARM-configs-at91-unselect-PIT.patch index 430e971ba..6a48749a2 100644 --- a/debian/patches-rt/0007-ARM-configs-at91-unselect-PIT.patch +++ b/debian/patches-rt/0007-ARM-configs-at91-unselect-PIT.patch @@ -1,7 +1,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:24 +0200 Subject: [PATCH 7/7] ARM: configs: at91: unselect PIT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The PIT is not required anymore to successfully boot and may actually harm in case preempt-rt is used because the PIT interrupt is shared. diff --git a/debian/patches-rt/ARM-enable-irq-in-translation-section-permission-fau.patch b/debian/patches-rt/ARM-enable-irq-in-translation-section-permission-fau.patch index 64e2fdb3d..501e892d6 100644 --- a/debian/patches-rt/ARM-enable-irq-in-translation-section-permission-fau.patch +++ b/debian/patches-rt/ARM-enable-irq-in-translation-section-permission-fau.patch @@ -1,7 +1,7 @@ From: "Yadi.hu" Date: Wed, 10 Dec 2014 10:32:09 +0800 Subject: ARM: enable irq in translation/section permission fault handlers -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Probably happens on all ARM, with CONFIG_PREEMPT_RT_FULL diff --git a/debian/patches-rt/Drivers-hv-vmbus-include-header-for-get_irq_regs.patch b/debian/patches-rt/Drivers-hv-vmbus-include-header-for-get_irq_regs.patch index b607356bb..8fcb18753 100644 --- a/debian/patches-rt/Drivers-hv-vmbus-include-header-for-get_irq_regs.patch +++ b/debian/patches-rt/Drivers-hv-vmbus-include-header-for-get_irq_regs.patch @@ -4,7 +4,7 @@ Subject: [PATCH] Drivers: hv: vmbus: include header for get_irq_regs() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz On !RT the header file get_irq_regs() gets pulled in via other header files. On RT it does not and the build fails: diff --git a/debian/patches-rt/EXP-rcu-Revert-expedited-GP-parallelization-cleverne.patch b/debian/patches-rt/EXP-rcu-Revert-expedited-GP-parallelization-cleverne.patch index 684ea51da..8574312be 100644 --- a/debian/patches-rt/EXP-rcu-Revert-expedited-GP-parallelization-cleverne.patch +++ b/debian/patches-rt/EXP-rcu-Revert-expedited-GP-parallelization-cleverne.patch @@ -1,7 +1,7 @@ From: Paul E. McKenney Date: Mon, 29 Oct 2018 11:53:01 +0100 Subject: [PATCH] EXP rcu: Revert expedited GP parallelization cleverness -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz (Commit 258ba8e089db23f760139266c232f01bad73f85c from linux-rcu) diff --git a/debian/patches-rt/HACK-printk-drop-the-logbuf_lock-more-often.patch b/debian/patches-rt/HACK-printk-drop-the-logbuf_lock-more-often.patch index c87ee1009..2f03e65ac 100644 --- a/debian/patches-rt/HACK-printk-drop-the-logbuf_lock-more-often.patch +++ b/debian/patches-rt/HACK-printk-drop-the-logbuf_lock-more-often.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 21 Mar 2013 19:01:05 +0100 Subject: printk: Drop the logbuf_lock more often -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The lock is hold with irgs off. The latency drops 500us+ on my arm bugs with a "full" buffer after executing "dmesg" on the shell. @@ -13,7 +13,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c -@@ -1415,12 +1415,23 @@ static int syslog_print_all(char __user +@@ -1420,12 +1420,23 @@ static int syslog_print_all(char __user u64 next_seq; u64 seq; u32 idx; @@ -37,7 +37,7 @@ Signed-off-by: Sebastian Andrzej Siewior /* * Find first record that fits, including all following records, * into the user-provided buffer for this dump. -@@ -1433,6 +1444,14 @@ static int syslog_print_all(char __user +@@ -1438,6 +1449,14 @@ static int syslog_print_all(char __user len += msg_print_text(msg, true, NULL, 0); idx = log_next(idx); seq++; @@ -52,7 +52,7 @@ Signed-off-by: Sebastian Andrzej Siewior } /* move first record forward until length fits into the buffer */ -@@ -1444,6 +1463,14 @@ static int syslog_print_all(char __user +@@ -1449,6 +1468,14 @@ static int syslog_print_all(char __user len -= msg_print_text(msg, true, NULL, 0); idx = log_next(idx); seq++; @@ -67,7 +67,7 @@ Signed-off-by: Sebastian Andrzej Siewior } /* last message fitting into this dump */ -@@ -1481,6 +1508,7 @@ static int syslog_print_all(char __user +@@ -1486,6 +1513,7 @@ static int syslog_print_all(char __user clear_seq = log_next_seq; clear_idx = log_next_idx; } diff --git a/debian/patches-rt/KVM-arm-arm64-downgrade-preempt_disable-d-region-to-.patch b/debian/patches-rt/KVM-arm-arm64-downgrade-preempt_disable-d-region-to-.patch index d23fde943..4f55e584e 100644 --- a/debian/patches-rt/KVM-arm-arm64-downgrade-preempt_disable-d-region-to-.patch +++ b/debian/patches-rt/KVM-arm-arm64-downgrade-preempt_disable-d-region-to-.patch @@ -1,7 +1,7 @@ From: Josh Cartwright Date: Thu, 11 Feb 2016 11:54:01 -0600 Subject: KVM: arm/arm64: downgrade preempt_disable()d region to migrate_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz kvm_arch_vcpu_ioctl_run() disables the use of preemption when updating the vgic and timer states to prevent the calling task from migrating to diff --git a/debian/patches-rt/NFSv4-replace-seqcount_t-with-a-seqlock_t.patch b/debian/patches-rt/NFSv4-replace-seqcount_t-with-a-seqlock_t.patch index 665a3ddc8..acacbc2e1 100644 --- a/debian/patches-rt/NFSv4-replace-seqcount_t-with-a-seqlock_t.patch +++ b/debian/patches-rt/NFSv4-replace-seqcount_t-with-a-seqlock_t.patch @@ -5,7 +5,7 @@ Cc: Anna Schumaker , linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de Subject: NFSv4: replace seqcount_t with a seqlock_t -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The raw_write_seqcount_begin() in nfs4_reclaim_open_state() bugs me because it maps to preempt_disable() in -RT which I can't have at this diff --git a/debian/patches-rt/add_migrate_disable.patch b/debian/patches-rt/add_migrate_disable.patch index d3d18e815..f3d75c648 100644 --- a/debian/patches-rt/add_migrate_disable.patch +++ b/debian/patches-rt/add_migrate_disable.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Sat, 27 May 2017 19:02:06 +0200 Subject: kernel/sched/core: add migrate_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz --- include/linux/preempt.h | 23 ++++++++ @@ -136,7 +136,7 @@ Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4 dest_cpu = cpumask_any_and(cpu_valid_mask, new_mask); if (task_running(rq, p) || p->state == TASK_WAKING) { struct migration_arg arg = { p, dest_cpu }; -@@ -7053,3 +7082,100 @@ const u32 sched_prio_to_wmult[40] = { +@@ -7059,3 +7088,100 @@ const u32 sched_prio_to_wmult[40] = { }; #undef CREATE_TRACE_POINTS diff --git a/debian/patches-rt/apparmor-use-a-locallock-instead-preempt_disable.patch b/debian/patches-rt/apparmor-use-a-locallock-instead-preempt_disable.patch index 59233b0c1..a594cafa2 100644 --- a/debian/patches-rt/apparmor-use-a-locallock-instead-preempt_disable.patch +++ b/debian/patches-rt/apparmor-use-a-locallock-instead-preempt_disable.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 11 Oct 2017 17:43:49 +0200 Subject: apparmor: use a locallock instead preempt_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz get_buffers() disables preemption which acts as a lock for the per-CPU variable. Since we can't disable preemption here on RT, a local_lock is diff --git a/debian/patches-rt/arch-arm64-Add-lazy-preempt-support.patch b/debian/patches-rt/arch-arm64-Add-lazy-preempt-support.patch index f786c52a7..aa17b6b46 100644 --- a/debian/patches-rt/arch-arm64-Add-lazy-preempt-support.patch +++ b/debian/patches-rt/arch-arm64-Add-lazy-preempt-support.patch @@ -1,7 +1,7 @@ From: Anders Roxell Date: Thu, 14 May 2015 17:52:17 +0200 Subject: arch/arm64: Add lazy preempt support -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz arm64 is missing support for PREEMPT_RT. The main feature which is lacking is support for lazy preemption. The arch-specific entry code, diff --git a/debian/patches-rt/arm-convert-boot-lock-to-raw.patch b/debian/patches-rt/arm-convert-boot-lock-to-raw.patch index 6601c0c25..c661e87b7 100644 --- a/debian/patches-rt/arm-convert-boot-lock-to-raw.patch +++ b/debian/patches-rt/arm-convert-boot-lock-to-raw.patch @@ -1,7 +1,7 @@ From: Frank Rowand Date: Mon, 19 Sep 2011 14:51:14 -0700 Subject: arm: Convert arm boot_lock to raw -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The arm boot_lock is used by the secondary processor startup code. The locking task is the idle thread, which has idle->sched_class == &idle_sched_class. diff --git a/debian/patches-rt/arm-disable-NEON-in-kernel-mode.patch b/debian/patches-rt/arm-disable-NEON-in-kernel-mode.patch index 87ab8ba48..27ee64a9c 100644 --- a/debian/patches-rt/arm-disable-NEON-in-kernel-mode.patch +++ b/debian/patches-rt/arm-disable-NEON-in-kernel-mode.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 1 Dec 2017 10:42:03 +0100 Subject: [PATCH] arm*: disable NEON in kernel mode -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz NEON in kernel mode is used by the crypto algorithms and raid6 code. While the raid6 code looks okay, the crypto algorithms do not: NEON diff --git a/debian/patches-rt/arm-enable-highmem-for-rt.patch b/debian/patches-rt/arm-enable-highmem-for-rt.patch index 9ed606c3b..e6b2be9d6 100644 --- a/debian/patches-rt/arm-enable-highmem-for-rt.patch +++ b/debian/patches-rt/arm-enable-highmem-for-rt.patch @@ -1,7 +1,7 @@ Subject: arm: Enable highmem for rt From: Thomas Gleixner Date: Wed, 13 Feb 2013 11:03:11 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz fixup highmem for ARM. diff --git a/debian/patches-rt/arm-highmem-flush-tlb-on-unmap.patch b/debian/patches-rt/arm-highmem-flush-tlb-on-unmap.patch index 758ecac3a..292b91842 100644 --- a/debian/patches-rt/arm-highmem-flush-tlb-on-unmap.patch +++ b/debian/patches-rt/arm-highmem-flush-tlb-on-unmap.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 11 Mar 2013 21:37:27 +0100 Subject: arm/highmem: Flush tlb on unmap -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The tlb should be flushed on unmap and thus make the mapping entry invalid. This is only done in the non-debug case which does not look diff --git a/debian/patches-rt/arm-include-definition-for-cpumask_t.patch b/debian/patches-rt/arm-include-definition-for-cpumask_t.patch index 94805b858..64c34b279 100644 --- a/debian/patches-rt/arm-include-definition-for-cpumask_t.patch +++ b/debian/patches-rt/arm-include-definition-for-cpumask_t.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 22 Dec 2016 17:28:33 +0100 Subject: [PATCH] arm: include definition for cpumask_t -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz This definition gets pulled in by other files. With the (later) split of RCU and spinlock.h it won't compile anymore. diff --git a/debian/patches-rt/arm-kprobe-replace-patch_lock-to-raw-lock.patch b/debian/patches-rt/arm-kprobe-replace-patch_lock-to-raw-lock.patch index bb2501199..5646beb29 100644 --- a/debian/patches-rt/arm-kprobe-replace-patch_lock-to-raw-lock.patch +++ b/debian/patches-rt/arm-kprobe-replace-patch_lock-to-raw-lock.patch @@ -1,7 +1,7 @@ From: Yang Shi Date: Thu, 10 Nov 2016 16:17:55 -0800 Subject: [PATCH] arm: kprobe: replace patch_lock to raw lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz When running kprobe on -rt kernel, the below bug is caught: diff --git a/debian/patches-rt/arm-preempt-lazy-support.patch b/debian/patches-rt/arm-preempt-lazy-support.patch index 6b699ac6b..dc7d1e9d4 100644 --- a/debian/patches-rt/arm-preempt-lazy-support.patch +++ b/debian/patches-rt/arm-preempt-lazy-support.patch @@ -1,7 +1,7 @@ Subject: arm: Add support for lazy preemption From: Thomas Gleixner Date: Wed, 31 Oct 2012 12:04:11 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Implement the arm pieces for lazy preempt. diff --git a/debian/patches-rt/arm-unwind-use_raw_lock.patch b/debian/patches-rt/arm-unwind-use_raw_lock.patch index abcd634cb..3063d9010 100644 --- a/debian/patches-rt/arm-unwind-use_raw_lock.patch +++ b/debian/patches-rt/arm-unwind-use_raw_lock.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 20 Sep 2013 14:31:54 +0200 Subject: arm/unwind: use a raw_spin_lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Mostly unwind is done with irqs enabled however SLUB may call it with irqs disabled while creating a new SLUB cache. diff --git a/debian/patches-rt/arm64-KVM-compute_layout-before-altenates-are-applie.patch b/debian/patches-rt/arm64-KVM-compute_layout-before-altenates-are-applie.patch index 4587b6c67..ef22ffaca 100644 --- a/debian/patches-rt/arm64-KVM-compute_layout-before-altenates-are-applie.patch +++ b/debian/patches-rt/arm64-KVM-compute_layout-before-altenates-are-applie.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 26 Jul 2018 09:13:42 +0200 Subject: [PATCH] arm64: KVM: compute_layout before altenates are applied -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz compute_layout() is invoked as part of an alternative fixup under stop_machine() and needs a sleeping lock as part of get_random_long(). diff --git a/debian/patches-rt/arm64-fpsimd-use-preemp_disable-in-addition-to-local.patch b/debian/patches-rt/arm64-fpsimd-use-preemp_disable-in-addition-to-local.patch index 92f50c7aa..deb855769 100644 --- a/debian/patches-rt/arm64-fpsimd-use-preemp_disable-in-addition-to-local.patch +++ b/debian/patches-rt/arm64-fpsimd-use-preemp_disable-in-addition-to-local.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 25 Jul 2018 14:02:38 +0200 Subject: [PATCH] arm64: fpsimd: use preemp_disable in addition to local_bh_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz In v4.16-RT I noticed a number of warnings from task_fpsimd_load(). The code disables BH and expects that it is not preemptible. On -RT the diff --git a/debian/patches-rt/at91_dont_enable_disable_clock.patch b/debian/patches-rt/at91_dont_enable_disable_clock.patch index 37ef2b26d..5f0ec08ce 100644 --- a/debian/patches-rt/at91_dont_enable_disable_clock.patch +++ b/debian/patches-rt/at91_dont_enable_disable_clock.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 09 Mar 2016 10:51:06 +0100 Subject: arm: at91: do not disable/enable clocks in a row -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Currently the driver will disable the clock and enable it one line later if it is switching from periodic mode into one shot. diff --git a/debian/patches-rt/block-blk-mq-move-blk_queue_usage_counter_release-in.patch b/debian/patches-rt/block-blk-mq-move-blk_queue_usage_counter_release-in.patch index a06c297cd..17e956620 100644 --- a/debian/patches-rt/block-blk-mq-move-blk_queue_usage_counter_release-in.patch +++ b/debian/patches-rt/block-blk-mq-move-blk_queue_usage_counter_release-in.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 13 Mar 2018 13:49:16 +0100 Subject: [PATCH] block: blk-mq: move blk_queue_usage_counter_release() into process context -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz | BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:914 | in_atomic(): 1, irqs_disabled(): 0, pid: 255, name: kworker/u257:6 @@ -52,7 +52,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/block/blk-core.c +++ b/block/blk-core.c -@@ -969,12 +969,21 @@ void blk_queue_exit(struct request_queue +@@ -968,12 +968,21 @@ void blk_queue_exit(struct request_queue percpu_ref_put(&q->q_usage_counter); } @@ -75,7 +75,7 @@ Signed-off-by: Sebastian Andrzej Siewior } static void blk_rq_timed_out_timer(struct timer_list *t) -@@ -1067,6 +1076,7 @@ struct request_queue *blk_alloc_queue_no +@@ -1066,6 +1075,7 @@ struct request_queue *blk_alloc_queue_no queue_flag_set_unlocked(QUEUE_FLAG_BYPASS, q); init_waitqueue_head(&q->mq_freeze_wq); @@ -83,7 +83,7 @@ Signed-off-by: Sebastian Andrzej Siewior /* * Init percpu_ref in atomic mode so that it's faster to shutdown. -@@ -3957,6 +3967,8 @@ int __init blk_dev_init(void) +@@ -3956,6 +3966,8 @@ int __init blk_dev_init(void) if (!kblockd_workqueue) panic("Failed to create kblockd\n"); diff --git a/debian/patches-rt/block-mq-don-t-complete-requests-via-IPI.patch b/debian/patches-rt/block-mq-don-t-complete-requests-via-IPI.patch index 73ad78dba..d78ac8df5 100644 --- a/debian/patches-rt/block-mq-don-t-complete-requests-via-IPI.patch +++ b/debian/patches-rt/block-mq-don-t-complete-requests-via-IPI.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 29 Jan 2015 15:10:08 +0100 Subject: block/mq: don't complete requests via IPI -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The IPI runs in hardirq context and there are sleeping locks. This patch moves the completion into a workqueue. diff --git a/debian/patches-rt/block-mq-drop-preempt-disable.patch b/debian/patches-rt/block-mq-drop-preempt-disable.patch index cfa262596..817f0ec1a 100644 --- a/debian/patches-rt/block-mq-drop-preempt-disable.patch +++ b/debian/patches-rt/block-mq-drop-preempt-disable.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: block/mq: do not invoke preempt_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz preempt_disable() and get_cpu() don't play well together with the sleeping locks it tries to allocate later. diff --git a/debian/patches-rt/block-mq-use-cpu_light.patch b/debian/patches-rt/block-mq-use-cpu_light.patch index 318a55ef2..b959111e5 100644 --- a/debian/patches-rt/block-mq-use-cpu_light.patch +++ b/debian/patches-rt/block-mq-use-cpu_light.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 9 Apr 2014 10:37:23 +0200 Subject: block: mq: use cpu_light() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz there is a might sleep splat because get_cpu() disables preemption and later we grab a lock. As a workaround for this we use get_cpu_light(). diff --git a/debian/patches-rt/block-use-cpu-chill.patch b/debian/patches-rt/block-use-cpu-chill.patch index 4bde40dbb..226f98296 100644 --- a/debian/patches-rt/block-use-cpu-chill.patch +++ b/debian/patches-rt/block-use-cpu-chill.patch @@ -1,7 +1,7 @@ Subject: block: Use cpu_chill() for retry loops From: Thomas Gleixner Date: Thu, 20 Dec 2012 18:28:26 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Retry loops on RT might loop forever when the modifying side was preempted. Steven also observed a live lock when there was a diff --git a/debian/patches-rt/cgroup-use-irqsave-in-cgroup_rstat_flush_locked.patch b/debian/patches-rt/cgroup-use-irqsave-in-cgroup_rstat_flush_locked.patch index 44bb9093a..edf6bf2d7 100644 --- a/debian/patches-rt/cgroup-use-irqsave-in-cgroup_rstat_flush_locked.patch +++ b/debian/patches-rt/cgroup-use-irqsave-in-cgroup_rstat_flush_locked.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 3 Jul 2018 18:19:48 +0200 Subject: [PATCH] cgroup: use irqsave in cgroup_rstat_flush_locked() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz All callers of cgroup_rstat_flush_locked() acquire cgroup_rstat_lock either with spin_lock_irq() or spin_lock_irqsave(). diff --git a/debian/patches-rt/cgroups-use-simple-wait-in-css_release.patch b/debian/patches-rt/cgroups-use-simple-wait-in-css_release.patch index ccab03459..5ffb713f1 100644 --- a/debian/patches-rt/cgroups-use-simple-wait-in-css_release.patch +++ b/debian/patches-rt/cgroups-use-simple-wait-in-css_release.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 13 Feb 2015 15:52:24 +0100 Subject: cgroups: use simple wait in css_release() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz To avoid: |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:914 diff --git a/debian/patches-rt/clocksource-tclib-allow-higher-clockrates.patch b/debian/patches-rt/clocksource-tclib-allow-higher-clockrates.patch index dd0652d87..33269a9a8 100644 --- a/debian/patches-rt/clocksource-tclib-allow-higher-clockrates.patch +++ b/debian/patches-rt/clocksource-tclib-allow-higher-clockrates.patch @@ -1,7 +1,7 @@ From: Benedikt Spranger Date: Mon, 8 Mar 2010 18:57:04 +0100 Subject: clocksource: TCLIB: Allow higher clock rates for clock events -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz As default the TCLIB uses the 32KiHz base clock rate for clock events. Add a compile time selection to allow higher clock resulution. diff --git a/debian/patches-rt/completion-use-simple-wait-queues.patch b/debian/patches-rt/completion-use-simple-wait-queues.patch index 3258b45d9..0f93bb22f 100644 --- a/debian/patches-rt/completion-use-simple-wait-queues.patch +++ b/debian/patches-rt/completion-use-simple-wait-queues.patch @@ -1,7 +1,7 @@ Subject: completion: Use simple wait queues From: Thomas Gleixner Date: Fri, 11 Jan 2013 11:23:51 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Completions have no long lasting callbacks and therefor do not need the complex waitqueue variant. Use simple waitqueues which reduces the @@ -300,7 +300,7 @@ Signed-off-by: Thomas Gleixner EXPORT_SYMBOL(completion_done); --- a/kernel/sched/core.c +++ b/kernel/sched/core.c -@@ -7102,7 +7102,10 @@ void migrate_disable(void) +@@ -7108,7 +7108,10 @@ void migrate_disable(void) return; } #ifdef CONFIG_SCHED_DEBUG @@ -312,7 +312,7 @@ Signed-off-by: Thomas Gleixner #endif if (p->migrate_disable) { -@@ -7132,7 +7135,10 @@ void migrate_enable(void) +@@ -7138,7 +7141,10 @@ void migrate_enable(void) } #ifdef CONFIG_SCHED_DEBUG diff --git a/debian/patches-rt/cond-resched-lock-rt-tweak.patch b/debian/patches-rt/cond-resched-lock-rt-tweak.patch index 8a4e50211..3ea048bbc 100644 --- a/debian/patches-rt/cond-resched-lock-rt-tweak.patch +++ b/debian/patches-rt/cond-resched-lock-rt-tweak.patch @@ -1,7 +1,7 @@ Subject: sched: Use the proper LOCK_OFFSET for cond_resched() From: Thomas Gleixner Date: Sun, 17 Jul 2011 22:51:33 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz RT does not increment preempt count when a 'sleeping' spinlock is locked. Update PREEMPT_LOCK_OFFSET for that case. diff --git a/debian/patches-rt/connector-cn_proc-Protect-send_msg-with-a-local-lock.patch b/debian/patches-rt/connector-cn_proc-Protect-send_msg-with-a-local-lock.patch index 4e4a9904e..61f8e6bd6 100644 --- a/debian/patches-rt/connector-cn_proc-Protect-send_msg-with-a-local-lock.patch +++ b/debian/patches-rt/connector-cn_proc-Protect-send_msg-with-a-local-lock.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Sun, 16 Oct 2016 05:11:54 +0200 Subject: [PATCH] connector/cn_proc: Protect send_msg() with a local lock on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:931 |in_atomic(): 1, irqs_disabled(): 0, pid: 31807, name: sleep diff --git a/debian/patches-rt/cpu-hotplug--Implement-CPU-pinning.patch b/debian/patches-rt/cpu-hotplug--Implement-CPU-pinning.patch index 87c30cf56..14d834119 100644 --- a/debian/patches-rt/cpu-hotplug--Implement-CPU-pinning.patch +++ b/debian/patches-rt/cpu-hotplug--Implement-CPU-pinning.patch @@ -1,7 +1,7 @@ Subject: cpu/hotplug: Implement CPU pinning From: Thomas Gleixner Date: Wed, 19 Jul 2017 17:31:20 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Signed-off-by: Thomas Gleixner --- @@ -21,7 +21,7 @@ Signed-off-by: Thomas Gleixner # endif --- a/kernel/cpu.c +++ b/kernel/cpu.c -@@ -74,6 +74,11 @@ static DEFINE_PER_CPU(struct cpuhp_cpu_s +@@ -75,6 +75,11 @@ static DEFINE_PER_CPU(struct cpuhp_cpu_s .fail = CPUHP_INVALID, }; @@ -33,7 +33,7 @@ Signed-off-by: Thomas Gleixner #if defined(CONFIG_LOCKDEP) && defined(CONFIG_SMP) static struct lockdep_map cpuhp_state_up_map = STATIC_LOCKDEP_MAP_INIT("cpuhp_state-up", &cpuhp_state_up_map); -@@ -285,7 +290,28 @@ static int cpu_hotplug_disabled; +@@ -286,7 +291,28 @@ static int cpu_hotplug_disabled; */ void pin_current_cpu(void) { @@ -62,7 +62,7 @@ Signed-off-by: Thomas Gleixner } /** -@@ -293,6 +319,13 @@ void pin_current_cpu(void) +@@ -294,6 +320,13 @@ void pin_current_cpu(void) */ void unpin_current_cpu(void) { @@ -76,7 +76,7 @@ Signed-off-by: Thomas Gleixner } DEFINE_STATIC_PERCPU_RWSEM(cpu_hotplug_lock); -@@ -846,6 +879,7 @@ static int take_cpu_down(void *_param) +@@ -853,6 +886,7 @@ static int take_cpu_down(void *_param) static int takedown_cpu(unsigned int cpu) { @@ -84,7 +84,7 @@ Signed-off-by: Thomas Gleixner struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu); int err; -@@ -858,11 +892,14 @@ static int takedown_cpu(unsigned int cpu +@@ -865,11 +899,14 @@ static int takedown_cpu(unsigned int cpu */ irq_lock_sparse(); @@ -99,7 +99,7 @@ Signed-off-by: Thomas Gleixner /* CPU refused to die */ irq_unlock_sparse(); /* Unpark the hotplug thread so we can rollback there */ -@@ -881,6 +918,7 @@ static int takedown_cpu(unsigned int cpu +@@ -888,6 +925,7 @@ static int takedown_cpu(unsigned int cpu wait_for_ap_thread(st, false); BUG_ON(st->state != CPUHP_AP_IDLE_DEAD); diff --git a/debian/patches-rt/cpufreq-drop-K8-s-driver-from-beeing-selected.patch b/debian/patches-rt/cpufreq-drop-K8-s-driver-from-beeing-selected.patch index 631c13a8e..448f0fb32 100644 --- a/debian/patches-rt/cpufreq-drop-K8-s-driver-from-beeing-selected.patch +++ b/debian/patches-rt/cpufreq-drop-K8-s-driver-from-beeing-selected.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 9 Apr 2015 15:23:01 +0200 Subject: cpufreq: drop K8's driver from beeing selected -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Ralf posted a picture of a backtrace from diff --git a/debian/patches-rt/cpumask-disable-offstack-on-rt.patch b/debian/patches-rt/cpumask-disable-offstack-on-rt.patch index b9c72b5e3..54c6b53e9 100644 --- a/debian/patches-rt/cpumask-disable-offstack-on-rt.patch +++ b/debian/patches-rt/cpumask-disable-offstack-on-rt.patch @@ -1,7 +1,7 @@ Subject: cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT From: Thomas Gleixner Date: Wed, 14 Dec 2011 01:03:49 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz There are "valid" GFP_ATOMIC allocations such as @@ -47,7 +47,7 @@ Signed-off-by: Thomas Gleixner --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig -@@ -938,7 +938,7 @@ config CALGARY_IOMMU_ENABLED_BY_DEFAULT +@@ -934,7 +934,7 @@ config CALGARY_IOMMU_ENABLED_BY_DEFAULT config MAXSMP bool "Enable Maximum number of SMP Processors and NUMA Nodes" depends on X86_64 && SMP && DEBUG_KERNEL diff --git a/debian/patches-rt/cpuset-Convert-callback_lock-to-raw_spinlock_t.patch b/debian/patches-rt/cpuset-Convert-callback_lock-to-raw_spinlock_t.patch index f3615c619..b760d261b 100644 --- a/debian/patches-rt/cpuset-Convert-callback_lock-to-raw_spinlock_t.patch +++ b/debian/patches-rt/cpuset-Convert-callback_lock-to-raw_spinlock_t.patch @@ -1,7 +1,7 @@ From: Mike Galbraith Date: Sun, 8 Jan 2017 09:32:25 +0100 Subject: [PATCH] cpuset: Convert callback_lock to raw_spinlock_t -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The two commits below add up to a cpuset might_sleep() splat for RT: diff --git a/debian/patches-rt/crypto-Reduce-preempt-disabled-regions-more-algos.patch b/debian/patches-rt/crypto-Reduce-preempt-disabled-regions-more-algos.patch index b3ef0bbfc..229106f39 100644 --- a/debian/patches-rt/crypto-Reduce-preempt-disabled-regions-more-algos.patch +++ b/debian/patches-rt/crypto-Reduce-preempt-disabled-regions-more-algos.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 21 Feb 2014 17:24:04 +0100 Subject: crypto: Reduce preempt disabled regions, more algos -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Don Estabrook reported | kernel: WARNING: CPU: 2 PID: 858 at kernel/sched/core.c:2428 migrate_disable+0xed/0x100() diff --git a/debian/patches-rt/crypto-caam-qi-simplify-CGR-allocation-freeing.patch b/debian/patches-rt/crypto-caam-qi-simplify-CGR-allocation-freeing.patch index ac1b944c2..9cd8e034c 100644 --- a/debian/patches-rt/crypto-caam-qi-simplify-CGR-allocation-freeing.patch +++ b/debian/patches-rt/crypto-caam-qi-simplify-CGR-allocation-freeing.patch @@ -4,7 +4,7 @@ Subject: [PATCH] crypto: caam/qi - simplify CGR allocation, freeing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz [Upstream commit 29e83c757006fd751966bdc53392bb22d74179c6] diff --git a/debian/patches-rt/crypto-cryptd-add-a-lock-instead-preempt_disable-loc.patch b/debian/patches-rt/crypto-cryptd-add-a-lock-instead-preempt_disable-loc.patch index 8b97cdf1c..0ae37a2cc 100644 --- a/debian/patches-rt/crypto-cryptd-add-a-lock-instead-preempt_disable-loc.patch +++ b/debian/patches-rt/crypto-cryptd-add-a-lock-instead-preempt_disable-loc.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 26 Jul 2018 18:52:00 +0200 Subject: [PATCH] crypto: cryptd - add a lock instead preempt_disable/local_bh_disable -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz cryptd has a per-CPU lock which protected with local_bh_disable() and preempt_disable(). diff --git a/debian/patches-rt/crypto-limit-more-FPU-enabled-sections.patch b/debian/patches-rt/crypto-limit-more-FPU-enabled-sections.patch index 98a2d2880..c14f22018 100644 --- a/debian/patches-rt/crypto-limit-more-FPU-enabled-sections.patch +++ b/debian/patches-rt/crypto-limit-more-FPU-enabled-sections.patch @@ -4,7 +4,7 @@ Subject: [PATCH] crypto: limit more FPU-enabled sections MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Those crypto drivers use SSE/AVX/… for their crypto work and in order to do so in kernel they need to enable the "FPU" in kernel mode which diff --git a/debian/patches-rt/crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch b/debian/patches-rt/crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch index 0f0b3ef54..f73b8f76f 100644 --- a/debian/patches-rt/crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch +++ b/debian/patches-rt/crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Wed, 11 Jul 2018 17:14:47 +0200 Subject: [PATCH] crypto: scompress - serialize RT percpu scratch buffer access with a local lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz | BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:974 | in_atomic(): 1, irqs_disabled(): 0, pid: 1401, name: cryptomgr_test diff --git a/debian/patches-rt/debugobjects-rt.patch b/debian/patches-rt/debugobjects-rt.patch index 7c153c23b..d854d352c 100644 --- a/debian/patches-rt/debugobjects-rt.patch +++ b/debian/patches-rt/debugobjects-rt.patch @@ -1,7 +1,7 @@ Subject: debugobjects: Make RT aware From: Thomas Gleixner Date: Sun, 17 Jul 2011 21:41:35 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Avoid filling the pool / allocating memory with irqs off(). diff --git a/debian/patches-rt/dm-rq-remove-BUG_ON-irqs_disabled-check.patch b/debian/patches-rt/dm-rq-remove-BUG_ON-irqs_disabled-check.patch index f126fc097..38c4db67a 100644 --- a/debian/patches-rt/dm-rq-remove-BUG_ON-irqs_disabled-check.patch +++ b/debian/patches-rt/dm-rq-remove-BUG_ON-irqs_disabled-check.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 27 Mar 2018 16:24:15 +0200 Subject: [PATCH] dm rq: remove BUG_ON(!irqs_disabled) check -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz In commit 052189a2ec95 ("dm: remove superfluous irq disablement in dm_request_fn") the spin_lock_irq() was replaced with spin_lock() + a diff --git a/debian/patches-rt/drivers-block-zram-Replace-bit-spinlocks-with-rtmute.patch b/debian/patches-rt/drivers-block-zram-Replace-bit-spinlocks-with-rtmute.patch index 3beff2f9d..02e462db9 100644 --- a/debian/patches-rt/drivers-block-zram-Replace-bit-spinlocks-with-rtmute.patch +++ b/debian/patches-rt/drivers-block-zram-Replace-bit-spinlocks-with-rtmute.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Thu, 31 Mar 2016 04:08:28 +0200 Subject: [PATCH] drivers/block/zram: Replace bit spinlocks with rtmutex for -rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz They're nondeterministic, and lead to ___might_sleep() splats in -rt. OTOH, they're a lot less wasteful than an rtmutex per page. diff --git a/debian/patches-rt/drivers-tty-fix-omap-lock-crap.patch b/debian/patches-rt/drivers-tty-fix-omap-lock-crap.patch index 0496b3ab9..206aa8f3b 100644 --- a/debian/patches-rt/drivers-tty-fix-omap-lock-crap.patch +++ b/debian/patches-rt/drivers-tty-fix-omap-lock-crap.patch @@ -1,7 +1,7 @@ Subject: tty/serial/omap: Make the locking RT aware From: Thomas Gleixner Date: Thu, 28 Jul 2011 13:32:57 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The lock is a sleeping lock and local_irq_save() is not the optimsation we are looking for. Redo it to make it work on -RT and diff --git a/debian/patches-rt/drivers-tty-pl011-irq-disable-madness.patch b/debian/patches-rt/drivers-tty-pl011-irq-disable-madness.patch index 8677729a0..306677daa 100644 --- a/debian/patches-rt/drivers-tty-pl011-irq-disable-madness.patch +++ b/debian/patches-rt/drivers-tty-pl011-irq-disable-madness.patch @@ -1,7 +1,7 @@ Subject: tty/serial/pl011: Make the locking work on RT From: Thomas Gleixner Date: Tue, 08 Jan 2013 21:36:51 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The lock is a sleeping lock and local_irq_save() is not the optimsation we are looking for. Redo it to make it work on -RT and non-RT. diff --git a/debian/patches-rt/drivers-zram-Don-t-disable-preemption-in-zcomp_strea.patch b/debian/patches-rt/drivers-zram-Don-t-disable-preemption-in-zcomp_strea.patch index 0ee655584..71061c4f5 100644 --- a/debian/patches-rt/drivers-zram-Don-t-disable-preemption-in-zcomp_strea.patch +++ b/debian/patches-rt/drivers-zram-Don-t-disable-preemption-in-zcomp_strea.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Thu, 20 Oct 2016 11:15:22 +0200 Subject: [PATCH] drivers/zram: Don't disable preemption in zcomp_stream_get/put() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz In v4.7, the driver switched to percpu compression streams, disabling preemption via get/put_cpu_ptr(). Use a per-zcomp_strm lock here. We diff --git a/debian/patches-rt/drivers-zram-fix-zcomp_stream_get-smp_processor_id-u.patch b/debian/patches-rt/drivers-zram-fix-zcomp_stream_get-smp_processor_id-u.patch index 88fb874a4..fc1385e5b 100644 --- a/debian/patches-rt/drivers-zram-fix-zcomp_stream_get-smp_processor_id-u.patch +++ b/debian/patches-rt/drivers-zram-fix-zcomp_stream_get-smp_processor_id-u.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Wed, 23 Aug 2017 11:57:29 +0200 Subject: [PATCH] drivers/zram: fix zcomp_stream_get() smp_processor_id() use in preemptible code -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Use get_local_ptr() instead this_cpu_ptr() to avoid a warning regarding smp_processor_id() in preemptible code. diff --git a/debian/patches-rt/drm-i915-disable-tracing-on-RT.patch b/debian/patches-rt/drm-i915-disable-tracing-on-RT.patch new file mode 100644 index 000000000..46da62eba --- /dev/null +++ b/debian/patches-rt/drm-i915-disable-tracing-on-RT.patch @@ -0,0 +1,41 @@ +From: Sebastian Andrzej Siewior +Date: Thu, 6 Dec 2018 09:52:20 +0100 +Subject: [PATCH] drm/i915: disable tracing on -RT +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz + +Luca Abeni reported this: +| BUG: scheduling while atomic: kworker/u8:2/15203/0x00000003 +| CPU: 1 PID: 15203 Comm: kworker/u8:2 Not tainted 4.19.1-rt3 #10 +| Call Trace: +| rt_spin_lock+0x3f/0x50 +| gen6_read32+0x45/0x1d0 [i915] +| g4x_get_vblank_counter+0x36/0x40 [i915] +| trace_event_raw_event_i915_pipe_update_start+0x7d/0xf0 [i915] + +The tracing events use trace_i915_pipe_update_start() among other events +use functions acquire spin locks. A few trace points use +intel_get_crtc_scanline(), others use ->get_vblank_counter() wich also +might acquire a sleeping lock. + +Based on this I don't see any other way than disable trace points on RT. + +Cc: stable-rt@vger.kernel.org +Reported-by: Luca Abeni +Signed-off-by: Sebastian Andrzej Siewior +--- + drivers/gpu/drm/i915/i915_trace.h | 4 ++++ + 1 file changed, 4 insertions(+) + +--- a/drivers/gpu/drm/i915/i915_trace.h ++++ b/drivers/gpu/drm/i915/i915_trace.h +@@ -2,6 +2,10 @@ + #if !defined(_I915_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ) + #define _I915_TRACE_H_ + ++#ifdef CONFIG_PREEMPT_RT_BASE ++#define NOTRACE ++#endif ++ + #include + #include + #include diff --git a/debian/patches-rt/drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch b/debian/patches-rt/drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch index 1d991c058..cc69cf70f 100644 --- a/debian/patches-rt/drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch +++ b/debian/patches-rt/drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch @@ -1,7 +1,7 @@ Subject: drm,i915: Use local_lock/unlock_irq() in intel_pipe_update_start/end() From: Mike Galbraith Date: Sat, 27 Feb 2016 09:01:42 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz [ 8.014039] BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:918 diff --git a/debian/patches-rt/drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch b/debian/patches-rt/drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch index f3669162a..54cfbc0f3 100644 --- a/debian/patches-rt/drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch +++ b/debian/patches-rt/drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch @@ -1,7 +1,7 @@ Subject: drm,radeon,i915: Use preempt_disable/enable_rt() where recommended From: Mike Galbraith Date: Sat, 27 Feb 2016 08:09:11 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz DRM folks identified the spots, so use them. diff --git a/debian/patches-rt/efi-Allow-efi-runtime.patch b/debian/patches-rt/efi-Allow-efi-runtime.patch index 8619f417d..0d9e35837 100644 --- a/debian/patches-rt/efi-Allow-efi-runtime.patch +++ b/debian/patches-rt/efi-Allow-efi-runtime.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 26 Jul 2018 15:06:10 +0200 Subject: [PATCH] efi: Allow efi=runtime -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz In case the option "efi=noruntime" is default at built-time, the user could overwrite its sate by `efi=runtime' and allow it again. diff --git a/debian/patches-rt/efi-Disable-runtime-services-on-RT.patch b/debian/patches-rt/efi-Disable-runtime-services-on-RT.patch index affe42e73..da93e6ff2 100644 --- a/debian/patches-rt/efi-Disable-runtime-services-on-RT.patch +++ b/debian/patches-rt/efi-Disable-runtime-services-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 26 Jul 2018 15:03:16 +0200 Subject: [PATCH] efi: Disable runtime services on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Based on meassurements the EFI functions get_variable / get_next_variable take up to 2us which looks okay. diff --git a/debian/patches-rt/epoll-use-get-cpu-light.patch b/debian/patches-rt/epoll-use-get-cpu-light.patch index f1a575492..fb39b9ac2 100644 --- a/debian/patches-rt/epoll-use-get-cpu-light.patch +++ b/debian/patches-rt/epoll-use-get-cpu-light.patch @@ -1,7 +1,7 @@ Subject: fs/epoll: Do not disable preemption on RT From: Thomas Gleixner Date: Fri, 08 Jul 2011 16:35:35 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz ep_call_nested() takes a sleeping lock so we can't disable preemption. The light version is enough since ep_call_nested() doesn't mind beeing diff --git a/debian/patches-rt/fs-aio-simple-simple-work.patch b/debian/patches-rt/fs-aio-simple-simple-work.patch index 8acf0f54d..9d481d668 100644 --- a/debian/patches-rt/fs-aio-simple-simple-work.patch +++ b/debian/patches-rt/fs-aio-simple-simple-work.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 16 Feb 2015 18:49:10 +0100 Subject: fs/aio: simple simple work -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:768 |in_atomic(): 1, irqs_disabled(): 0, pid: 26, name: rcuos/2 diff --git a/debian/patches-rt/fs-dcache-bring-back-explicit-INIT_HLIST_BL_HEAD-in.patch b/debian/patches-rt/fs-dcache-bring-back-explicit-INIT_HLIST_BL_HEAD-in.patch index afcb6eac8..483ff50a2 100644 --- a/debian/patches-rt/fs-dcache-bring-back-explicit-INIT_HLIST_BL_HEAD-in.patch +++ b/debian/patches-rt/fs-dcache-bring-back-explicit-INIT_HLIST_BL_HEAD-in.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 13 Sep 2017 12:32:34 +0200 Subject: [PATCH] fs/dcache: bring back explicit INIT_HLIST_BL_HEAD init -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Commit 3d375d78593c ("mm: update callers to use HASH_ZERO flag") removed INIT_HLIST_BL_HEAD and uses the ZERO flag instead for the init. However diff --git a/debian/patches-rt/fs-dcache-disable-preemption-on-i_dir_seq-s-write-si.patch b/debian/patches-rt/fs-dcache-disable-preemption-on-i_dir_seq-s-write-si.patch index 16a0f76d9..905fcea66 100644 --- a/debian/patches-rt/fs-dcache-disable-preemption-on-i_dir_seq-s-write-si.patch +++ b/debian/patches-rt/fs-dcache-disable-preemption-on-i_dir_seq-s-write-si.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 20 Oct 2017 11:29:53 +0200 Subject: [PATCH] fs/dcache: disable preemption on i_dir_seq's write side -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz i_dir_seq is an opencoded seqcounter. Based on the code it looks like we could have two writers in parallel despite the fact that the d_lock is diff --git a/debian/patches-rt/fs-dcache-use-cpu-chill-in-trylock-loops.patch b/debian/patches-rt/fs-dcache-use-cpu-chill-in-trylock-loops.patch index 5bb49231e..532515d93 100644 --- a/debian/patches-rt/fs-dcache-use-cpu-chill-in-trylock-loops.patch +++ b/debian/patches-rt/fs-dcache-use-cpu-chill-in-trylock-loops.patch @@ -1,7 +1,7 @@ Subject: fs: dcache: Use cpu_chill() in trylock loops From: Thomas Gleixner Date: Wed, 07 Mar 2012 21:00:34 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Retry loops on RT might loop forever when the modifying side was preempted. Use cpu_chill() instead of cpu_relax() to let the system diff --git a/debian/patches-rt/fs-dcache-use-swait_queue-instead-of-waitqueue.patch b/debian/patches-rt/fs-dcache-use-swait_queue-instead-of-waitqueue.patch index 8cefb2e4b..3cafde8be 100644 --- a/debian/patches-rt/fs-dcache-use-swait_queue-instead-of-waitqueue.patch +++ b/debian/patches-rt/fs-dcache-use-swait_queue-instead-of-waitqueue.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 14 Sep 2016 14:35:49 +0200 Subject: [PATCH] fs/dcache: use swait_queue instead of waitqueue -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz __d_lookup_done() invokes wake_up_all() while holding a hlist_bl_lock() which disables preemption. As a workaround convert it to swait. diff --git a/debian/patches-rt/fs-jbd-replace-bh_state-lock.patch b/debian/patches-rt/fs-jbd-replace-bh_state-lock.patch index 7835bf172..c1d3a74ee 100644 --- a/debian/patches-rt/fs-jbd-replace-bh_state-lock.patch +++ b/debian/patches-rt/fs-jbd-replace-bh_state-lock.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 18 Mar 2011 10:11:25 +0100 Subject: fs: jbd/jbd2: Make state lock and journal head lock rt safe -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz bit_spin_locks break under RT. diff --git a/debian/patches-rt/fs-nfs-turn-rmdir_sem-into-a-semaphore.patch b/debian/patches-rt/fs-nfs-turn-rmdir_sem-into-a-semaphore.patch index 28380122b..7fcc3c4f9 100644 --- a/debian/patches-rt/fs-nfs-turn-rmdir_sem-into-a-semaphore.patch +++ b/debian/patches-rt/fs-nfs-turn-rmdir_sem-into-a-semaphore.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 15 Sep 2016 10:51:27 +0200 Subject: [PATCH] fs/nfs: turn rmdir_sem into a semaphore -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The RW semaphore had a reader side which used the _non_owner version because it most likely took the reader lock in one thread and released it diff --git a/debian/patches-rt/fs-replace-bh_uptodate_lock-for-rt.patch b/debian/patches-rt/fs-replace-bh_uptodate_lock-for-rt.patch index 0cc698f4c..bd754acc2 100644 --- a/debian/patches-rt/fs-replace-bh_uptodate_lock-for-rt.patch +++ b/debian/patches-rt/fs-replace-bh_uptodate_lock-for-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 18 Mar 2011 09:18:52 +0100 Subject: buffer_head: Replace bh_uptodate_lock for -rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Wrap the bit_spin_lock calls into a separate inline and add the RT replacements with a real spinlock. diff --git a/debian/patches-rt/fscache-initialize-cookie-hash-table-raw-spinlocks.patch b/debian/patches-rt/fscache-initialize-cookie-hash-table-raw-spinlocks.patch index aff6c5df0..84ce15fda 100644 --- a/debian/patches-rt/fscache-initialize-cookie-hash-table-raw-spinlocks.patch +++ b/debian/patches-rt/fscache-initialize-cookie-hash-table-raw-spinlocks.patch @@ -1,7 +1,7 @@ From: Clark Williams Date: Tue, 3 Jul 2018 13:34:30 -0500 Subject: [PATCH] fscache: initialize cookie hash table raw spinlocks -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The fscache cookie mechanism uses a hash table of hlist_bl_head structures. The PREEMPT_RT patcheset adds a raw spinlock to this structure and so on PREEMPT_RT diff --git a/debian/patches-rt/ftrace-Fix-trace-header-alignment.patch b/debian/patches-rt/ftrace-Fix-trace-header-alignment.patch index 21d8232f9..7fe39db18 100644 --- a/debian/patches-rt/ftrace-Fix-trace-header-alignment.patch +++ b/debian/patches-rt/ftrace-Fix-trace-header-alignment.patch @@ -1,7 +1,7 @@ From: Mike Galbraith Date: Sun, 16 Oct 2016 05:08:30 +0200 Subject: [PATCH] ftrace: Fix trace header alignment -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Line up helper arrows to the right column. diff --git a/debian/patches-rt/ftrace-migrate-disable-tracing.patch b/debian/patches-rt/ftrace-migrate-disable-tracing.patch index c13f0bf1d..1497456e9 100644 --- a/debian/patches-rt/ftrace-migrate-disable-tracing.patch +++ b/debian/patches-rt/ftrace-migrate-disable-tracing.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Sun, 17 Jul 2011 21:56:42 +0200 Subject: trace: Add migrate-disabled counter to tracing output -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Signed-off-by: Thomas Gleixner --- diff --git a/debian/patches-rt/futex-Ensure-lock-unlock-symetry-versus-pi_lock-and-.patch b/debian/patches-rt/futex-Ensure-lock-unlock-symetry-versus-pi_lock-and-.patch index 018db2be3..a8dce88c5 100644 --- a/debian/patches-rt/futex-Ensure-lock-unlock-symetry-versus-pi_lock-and-.patch +++ b/debian/patches-rt/futex-Ensure-lock-unlock-symetry-versus-pi_lock-and-.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 1 Mar 2013 11:17:42 +0100 Subject: futex: Ensure lock/unlock symetry versus pi_lock and hash bucket lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz In exit_pi_state_list() we have the following locking construct: diff --git a/debian/patches-rt/futex-requeue-pi-fix.patch b/debian/patches-rt/futex-requeue-pi-fix.patch index f77b65424..b7389b5f5 100644 --- a/debian/patches-rt/futex-requeue-pi-fix.patch +++ b/debian/patches-rt/futex-requeue-pi-fix.patch @@ -1,7 +1,7 @@ From: Steven Rostedt Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: futex: Fix bug on when a requeued RT task times out -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Requeue with timeout causes a bug with PREEMPT_RT_FULL. diff --git a/debian/patches-rt/futex-workaround-migrate_disable-enable-in-different.patch b/debian/patches-rt/futex-workaround-migrate_disable-enable-in-different.patch index 90396e270..04f50d814 100644 --- a/debian/patches-rt/futex-workaround-migrate_disable-enable-in-different.patch +++ b/debian/patches-rt/futex-workaround-migrate_disable-enable-in-different.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Wed, 8 Mar 2017 14:23:35 +0100 Subject: [PATCH] futex: workaround migrate_disable/enable in different context -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz migrate_disable()/migrate_enable() takes a different path in atomic() vs !atomic() context. These little hacks ensure that we don't underflow / overflow diff --git a/debian/patches-rt/genirq-disable-irqpoll-on-rt.patch b/debian/patches-rt/genirq-disable-irqpoll-on-rt.patch index 0bd8f0ba8..26c8ad1b1 100644 --- a/debian/patches-rt/genirq-disable-irqpoll-on-rt.patch +++ b/debian/patches-rt/genirq-disable-irqpoll-on-rt.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:29:57 -0500 Subject: genirq: Disable irqpoll on -rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Creates long latencies for no value diff --git a/debian/patches-rt/genirq-do-not-invoke-the-affinity-callback-via-a-wor.patch b/debian/patches-rt/genirq-do-not-invoke-the-affinity-callback-via-a-wor.patch index 89292d6bd..efa5b9624 100644 --- a/debian/patches-rt/genirq-do-not-invoke-the-affinity-callback-via-a-wor.patch +++ b/debian/patches-rt/genirq-do-not-invoke-the-affinity-callback-via-a-wor.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 21 Aug 2013 17:48:46 +0200 Subject: genirq: Do not invoke the affinity callback via a workqueue on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Joe Korty reported, that __irq_set_affinity_locked() schedules a workqueue while holding a rawlock which results in a might_sleep() diff --git a/debian/patches-rt/genirq-force-threading.patch b/debian/patches-rt/genirq-force-threading.patch index 1a0c330dd..5a5d395d8 100644 --- a/debian/patches-rt/genirq-force-threading.patch +++ b/debian/patches-rt/genirq-force-threading.patch @@ -1,7 +1,7 @@ Subject: genirq: Force interrupt thread on RT From: Thomas Gleixner Date: Sun, 03 Apr 2011 11:57:29 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Force threaded_irqs and optimize the code (force_irqthreads) in regard to this. diff --git a/debian/patches-rt/genirq-update-irq_set_irqchip_state-documentation.patch b/debian/patches-rt/genirq-update-irq_set_irqchip_state-documentation.patch index 413a192e9..de8fef266 100644 --- a/debian/patches-rt/genirq-update-irq_set_irqchip_state-documentation.patch +++ b/debian/patches-rt/genirq-update-irq_set_irqchip_state-documentation.patch @@ -1,7 +1,7 @@ From: Josh Cartwright Date: Thu, 11 Feb 2016 11:54:00 -0600 Subject: genirq: update irq_set_irqchip_state documentation -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz On -rt kernels, the use of migrate_disable()/migrate_enable() is sufficient to guarantee a task isn't moved to another CPU. Update the @@ -15,7 +15,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c -@@ -2270,7 +2270,7 @@ EXPORT_SYMBOL_GPL(irq_get_irqchip_state) +@@ -2274,7 +2274,7 @@ EXPORT_SYMBOL_GPL(irq_get_irqchip_state) * This call sets the internal irqchip state of an interrupt, * depending on the value of @which. * diff --git a/debian/patches-rt/hotplug-duct-tape-RT-rwlock-usage-for-non-RT.patch b/debian/patches-rt/hotplug-duct-tape-RT-rwlock-usage-for-non-RT.patch index 87fb3dbca..0f84d07c4 100644 --- a/debian/patches-rt/hotplug-duct-tape-RT-rwlock-usage-for-non-RT.patch +++ b/debian/patches-rt/hotplug-duct-tape-RT-rwlock-usage-for-non-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 4 Aug 2017 18:31:00 +0200 Subject: [PATCH] hotplug: duct-tape RT-rwlock usage for non-RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz This type is only available on -RT. We need to craft something for non-RT. Since the only migrate_disable() user is -RT only, there is no @@ -14,7 +14,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/kernel/cpu.c +++ b/kernel/cpu.c -@@ -74,7 +74,7 @@ static DEFINE_PER_CPU(struct cpuhp_cpu_s +@@ -75,7 +75,7 @@ static DEFINE_PER_CPU(struct cpuhp_cpu_s .fail = CPUHP_INVALID, }; @@ -23,7 +23,7 @@ Signed-off-by: Sebastian Andrzej Siewior static DEFINE_PER_CPU(struct rt_rw_lock, cpuhp_pin_lock) = \ __RWLOCK_RT_INITIALIZER(cpuhp_pin_lock); #endif -@@ -290,6 +290,7 @@ static int cpu_hotplug_disabled; +@@ -291,6 +291,7 @@ static int cpu_hotplug_disabled; */ void pin_current_cpu(void) { @@ -31,7 +31,7 @@ Signed-off-by: Sebastian Andrzej Siewior struct rt_rw_lock *cpuhp_pin; unsigned int cpu; int ret; -@@ -312,6 +313,7 @@ void pin_current_cpu(void) +@@ -313,6 +314,7 @@ void pin_current_cpu(void) goto again; } current->pinned_on_cpu = cpu; @@ -39,7 +39,7 @@ Signed-off-by: Sebastian Andrzej Siewior } /** -@@ -319,6 +321,7 @@ void pin_current_cpu(void) +@@ -320,6 +322,7 @@ void pin_current_cpu(void) */ void unpin_current_cpu(void) { @@ -47,7 +47,7 @@ Signed-off-by: Sebastian Andrzej Siewior struct rt_rw_lock *cpuhp_pin = this_cpu_ptr(&cpuhp_pin_lock); if (WARN_ON(current->pinned_on_cpu != smp_processor_id())) -@@ -326,6 +329,7 @@ void unpin_current_cpu(void) +@@ -327,6 +330,7 @@ void unpin_current_cpu(void) current->pinned_on_cpu = -1; __read_rt_unlock(cpuhp_pin); @@ -55,7 +55,7 @@ Signed-off-by: Sebastian Andrzej Siewior } DEFINE_STATIC_PERCPU_RWSEM(cpu_hotplug_lock); -@@ -879,7 +883,9 @@ static int take_cpu_down(void *_param) +@@ -886,7 +890,9 @@ static int take_cpu_down(void *_param) static int takedown_cpu(unsigned int cpu) { @@ -65,7 +65,7 @@ Signed-off-by: Sebastian Andrzej Siewior struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu); int err; -@@ -892,14 +898,18 @@ static int takedown_cpu(unsigned int cpu +@@ -899,14 +905,18 @@ static int takedown_cpu(unsigned int cpu */ irq_lock_sparse(); @@ -84,7 +84,7 @@ Signed-off-by: Sebastian Andrzej Siewior /* CPU refused to die */ irq_unlock_sparse(); /* Unpark the hotplug thread so we can rollback there */ -@@ -918,7 +928,9 @@ static int takedown_cpu(unsigned int cpu +@@ -925,7 +935,9 @@ static int takedown_cpu(unsigned int cpu wait_for_ap_thread(st, false); BUG_ON(st->state != CPUHP_AP_IDLE_DEAD); diff --git a/debian/patches-rt/hotplug-light-get-online-cpus.patch b/debian/patches-rt/hotplug-light-get-online-cpus.patch index e38a7a608..bce5f5a1b 100644 --- a/debian/patches-rt/hotplug-light-get-online-cpus.patch +++ b/debian/patches-rt/hotplug-light-get-online-cpus.patch @@ -1,7 +1,7 @@ Subject: hotplug: Lightweight get online cpus From: Thomas Gleixner Date: Wed, 15 Jun 2011 12:36:06 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz get_online_cpus() is a heavy weight function which involves a global mutex. migrate_disable() wants a simpler construct which prevents only @@ -41,7 +41,7 @@ Signed-off-by: Thomas Gleixner /* Wrappers which go away once all code is converted */ --- a/kernel/cpu.c +++ b/kernel/cpu.c -@@ -280,6 +280,21 @@ static int cpu_hotplug_disabled; +@@ -281,6 +281,21 @@ static int cpu_hotplug_disabled; #ifdef CONFIG_HOTPLUG_CPU @@ -65,7 +65,7 @@ Signed-off-by: Thomas Gleixner void cpus_read_lock(void) --- a/kernel/sched/core.c +++ b/kernel/sched/core.c -@@ -7197,6 +7197,7 @@ void migrate_disable(void) +@@ -7203,6 +7203,7 @@ void migrate_disable(void) } preempt_disable(); @@ -73,7 +73,7 @@ Signed-off-by: Thomas Gleixner migrate_disable_update_cpus_allowed(p); p->migrate_disable = 1; -@@ -7262,12 +7263,15 @@ void migrate_enable(void) +@@ -7268,12 +7269,15 @@ void migrate_enable(void) arg.task = p; arg.dest_cpu = dest_cpu; diff --git a/debian/patches-rt/hrtimer-Move-schedule_work-call-to-helper-thread.patch b/debian/patches-rt/hrtimer-Move-schedule_work-call-to-helper-thread.patch index c2f5aba8c..f45887314 100644 --- a/debian/patches-rt/hrtimer-Move-schedule_work-call-to-helper-thread.patch +++ b/debian/patches-rt/hrtimer-Move-schedule_work-call-to-helper-thread.patch @@ -1,7 +1,7 @@ From: Yang Shi Date: Mon, 16 Sep 2013 14:09:19 -0700 Subject: hrtimer: Move schedule_work call to helper thread -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz When run ltp leapsec_timer test, the following call trace is caught: diff --git a/debian/patches-rt/hrtimer-by-timers-by-default-into-the-softirq-context.patch b/debian/patches-rt/hrtimer-by-timers-by-default-into-the-softirq-context.patch index e5c588e7e..cb1173a7e 100644 --- a/debian/patches-rt/hrtimer-by-timers-by-default-into-the-softirq-context.patch +++ b/debian/patches-rt/hrtimer-by-timers-by-default-into-the-softirq-context.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 3 Jul 2009 08:44:31 -0500 Subject: hrtimer: by timers by default into the softirq context -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz We can't have hrtimers callbacks running in hardirq context on RT. Therefore the timers are deferred to the softirq context by default. @@ -28,7 +28,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c -@@ -2245,7 +2245,7 @@ int kvm_create_lapic(struct kvm_vcpu *vc +@@ -2250,7 +2250,7 @@ int kvm_create_lapic(struct kvm_vcpu *vc apic->vcpu = vcpu; hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, diff --git a/debian/patches-rt/hrtimer-consolidate-hrtimer_init-hrtimer_init_sleepe.patch b/debian/patches-rt/hrtimer-consolidate-hrtimer_init-hrtimer_init_sleepe.patch index 9b1c42269..784f7a576 100644 --- a/debian/patches-rt/hrtimer-consolidate-hrtimer_init-hrtimer_init_sleepe.patch +++ b/debian/patches-rt/hrtimer-consolidate-hrtimer_init-hrtimer_init_sleepe.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 3 Jul 2018 11:25:41 +0200 Subject: [PATCH v2] hrtimer: consolidate hrtimer_init() + hrtimer_init_sleeper() calls -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz hrtimer_init_sleeper() calls require a prior initialisation of the hrtimer object with hrtimer_init(). Lets make the initialisation of @@ -27,7 +27,7 @@ Signed-off-by: Anna-Maria Gleixner --- a/block/blk-mq.c +++ b/block/blk-mq.c -@@ -3115,10 +3115,9 @@ static bool blk_mq_poll_hybrid_sleep(str +@@ -3116,10 +3116,9 @@ static bool blk_mq_poll_hybrid_sleep(str kt = nsecs; mode = HRTIMER_MODE_REL; diff --git a/debian/patches-rt/hrtimer-move-state-change-before-hrtimer_cancel-in-d.patch b/debian/patches-rt/hrtimer-move-state-change-before-hrtimer_cancel-in-d.patch new file mode 100644 index 000000000..92e3a299e --- /dev/null +++ b/debian/patches-rt/hrtimer-move-state-change-before-hrtimer_cancel-in-d.patch @@ -0,0 +1,45 @@ +From: Sebastian Andrzej Siewior +Date: Thu, 6 Dec 2018 10:15:13 +0100 +Subject: [PATCH] hrtimer: move state change before hrtimer_cancel in + do_nanosleep() +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz + +There is a small window between setting t->task to NULL and waking the +task up (which would set TASK_RUNNING). So the timer would fire, run and +set ->task to NULL while the other side/do_nanosleep() wouldn't enter +freezable_schedule(). After all we are peemptible here (in +do_nanosleep() and on the timer wake up path) and on KVM/virt the +virt-CPU might get preempted. +So do_nanosleep() wouldn't enter freezable_schedule() but cancel the +timer which is still running and wait for it via +hrtimer_wait_for_timer(). Then wait_event()/might_sleep() would complain +that it is invoked with state != TASK_RUNNING. +This isn't a problem since it would be reset to TASK_RUNNING later +anyway and we don't rely on the previous state. + +Move the state update to TASK_RUNNING before hrtimer_cancel() so there +are no complains from might_sleep() about wrong state. + +Cc: stable-rt@vger.kernel.org +Reviewed-by: Daniel Bristot de Oliveira +Signed-off-by: Sebastian Andrzej Siewior +--- + kernel/time/hrtimer.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/kernel/time/hrtimer.c ++++ b/kernel/time/hrtimer.c +@@ -1785,12 +1785,12 @@ static int __sched do_nanosleep(struct h + if (likely(t->task)) + freezable_schedule(); + ++ __set_current_state(TASK_RUNNING); + hrtimer_cancel(&t->timer); + mode = HRTIMER_MODE_ABS; + + } while (t->task && !signal_pending(current)); + +- __set_current_state(TASK_RUNNING); + + if (!t->task) + return 0; diff --git a/debian/patches-rt/hrtimers-prepare-full-preemption.patch b/debian/patches-rt/hrtimers-prepare-full-preemption.patch index 05d87fce8..90e234eef 100644 --- a/debian/patches-rt/hrtimers-prepare-full-preemption.patch +++ b/debian/patches-rt/hrtimers-prepare-full-preemption.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:29:34 -0500 Subject: hrtimers: Prepare full preemption -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Make cancellation of a running callback in softirq context safe against preemption. diff --git a/debian/patches-rt/irq-allow-disabling-of-softirq-processing-in-irq-thread-context.patch b/debian/patches-rt/irq-allow-disabling-of-softirq-processing-in-irq-thread-context.patch index 8eb4e5ffa..031585911 100644 --- a/debian/patches-rt/irq-allow-disabling-of-softirq-processing-in-irq-thread-context.patch +++ b/debian/patches-rt/irq-allow-disabling-of-softirq-processing-in-irq-thread-context.patch @@ -1,7 +1,7 @@ Subject: genirq: Allow disabling of softirq processing in irq thread context From: Thomas Gleixner Date: Tue, 31 Jan 2012 13:01:27 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The processing of softirqs in irq thread context is a performance gain for the non-rt workloads of a system, but it's counterproductive for diff --git a/debian/patches-rt/irqchip-gic-v3-its-Move-pending-table-allocation-to-.patch b/debian/patches-rt/irqchip-gic-v3-its-Move-pending-table-allocation-to-.patch index 35298ddac..78cfab585 100644 --- a/debian/patches-rt/irqchip-gic-v3-its-Move-pending-table-allocation-to-.patch +++ b/debian/patches-rt/irqchip-gic-v3-its-Move-pending-table-allocation-to-.patch @@ -2,7 +2,7 @@ From: Marc Zyngier Date: Fri, 27 Jul 2018 13:38:54 +0100 Subject: [PATCH] irqchip/gic-v3-its: Move pending table allocation to init time -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Signed-off-by: Marc Zyngier Signed-off-by: Sebastian Andrzej Siewior diff --git a/debian/patches-rt/irqwork-push_most_work_into_softirq_context.patch b/debian/patches-rt/irqwork-push_most_work_into_softirq_context.patch index b8b47d188..2b9e6a550 100644 --- a/debian/patches-rt/irqwork-push_most_work_into_softirq_context.patch +++ b/debian/patches-rt/irqwork-push_most_work_into_softirq_context.patch @@ -1,7 +1,7 @@ Subject: irqwork: push most work into softirq context From: Sebastian Andrzej Siewior Date: Tue, 23 Jun 2015 15:32:51 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Initially we defered all irqwork into softirq because we didn't want the latency spikes if perf or another user was busy and delayed the RT task. diff --git a/debian/patches-rt/jump-label-rt.patch b/debian/patches-rt/jump-label-rt.patch index ef33f513f..4dbc68f4a 100644 --- a/debian/patches-rt/jump-label-rt.patch +++ b/debian/patches-rt/jump-label-rt.patch @@ -1,7 +1,7 @@ Subject: jump-label: disable if stop_machine() is used From: Thomas Gleixner Date: Wed, 08 Jul 2015 17:14:48 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Some architectures are using stop_machine() while switching the opcode which leads to latency spikes. diff --git a/debian/patches-rt/kconfig-disable-a-few-options-rt.patch b/debian/patches-rt/kconfig-disable-a-few-options-rt.patch index 5d2190438..d67f43d09 100644 --- a/debian/patches-rt/kconfig-disable-a-few-options-rt.patch +++ b/debian/patches-rt/kconfig-disable-a-few-options-rt.patch @@ -1,7 +1,7 @@ Subject: kconfig: Disable config options which are not RT compatible From: Thomas Gleixner Date: Sun, 24 Jul 2011 12:11:43 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Disable stuff which is known to have issues on RT diff --git a/debian/patches-rt/kconfig-preempt-rt-full.patch b/debian/patches-rt/kconfig-preempt-rt-full.patch index f2fd0971c..b563b623c 100644 --- a/debian/patches-rt/kconfig-preempt-rt-full.patch +++ b/debian/patches-rt/kconfig-preempt-rt-full.patch @@ -1,7 +1,7 @@ Subject: kconfig: Add PREEMPT_RT_FULL From: Thomas Gleixner Date: Wed, 29 Jun 2011 14:58:57 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Introduce the final symbol for PREEMPT_RT_FULL. diff --git a/debian/patches-rt/kernel-printk-Don-t-try-to-print-from-IRQ-NMI-region.patch b/debian/patches-rt/kernel-printk-Don-t-try-to-print-from-IRQ-NMI-region.patch index 5a2c2a860..a226dc421 100644 --- a/debian/patches-rt/kernel-printk-Don-t-try-to-print-from-IRQ-NMI-region.patch +++ b/debian/patches-rt/kernel-printk-Don-t-try-to-print-from-IRQ-NMI-region.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 19 May 2016 17:45:27 +0200 Subject: [PATCH] kernel/printk: Don't try to print from IRQ/NMI region -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz On -RT we try to acquire sleeping locks which might lead to warnings from lockdep or a warn_on() from spin_try_lock() (which is a rtmutex on @@ -16,7 +16,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c -@@ -1777,6 +1777,11 @@ static void call_console_drivers(const c +@@ -1782,6 +1782,11 @@ static void call_console_drivers(const c if (!console_drivers) return; @@ -28,7 +28,7 @@ Signed-off-by: Sebastian Andrzej Siewior migrate_disable(); for_each_console(con) { if (exclusive_console && con != exclusive_console) -@@ -2535,6 +2540,11 @@ void console_unblank(void) +@@ -2540,6 +2545,11 @@ void console_unblank(void) { struct console *c; diff --git a/debian/patches-rt/kernel-sched-Provide-a-pointer-to-the-valid-CPU-mask.patch b/debian/patches-rt/kernel-sched-Provide-a-pointer-to-the-valid-CPU-mask.patch index 3a9bad479..b63847fa1 100644 --- a/debian/patches-rt/kernel-sched-Provide-a-pointer-to-the-valid-CPU-mask.patch +++ b/debian/patches-rt/kernel-sched-Provide-a-pointer-to-the-valid-CPU-mask.patch @@ -4,7 +4,7 @@ Subject: [PATCH] kernel: sched: Provide a pointer to the valid CPU mask MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz In commit 4b53a3412d66 ("sched/core: Remove the tsk_nr_cpus_allowed() wrapper") the tsk_nr_cpus_allowed() wrapper was removed. There was not @@ -260,7 +260,7 @@ Signed-off-by: Sebastian Andrzej Siewior #ifdef CONFIG_PREEMPT_RCU int rcu_read_lock_nesting; -@@ -1389,7 +1390,7 @@ extern struct pid *cad_pid; +@@ -1390,7 +1391,7 @@ extern struct pid *cad_pid; #define PF_KTHREAD 0x00200000 /* I am a kernel thread */ #define PF_RANDOMIZE 0x00400000 /* Randomize virtual address space */ #define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */ @@ -617,7 +617,7 @@ Signed-off-by: Sebastian Andrzej Siewior /* * Replace recent_used_cpu with prev as it is a potential * candidate for the next wake: -@@ -6317,7 +6317,7 @@ select_task_rq_fair(struct task_struct * +@@ -6351,7 +6351,7 @@ select_task_rq_fair(struct task_struct * if (sd_flag & SD_BALANCE_WAKE) { record_wakee(p); want_affine = !wake_wide(p) && !wake_cap(p, cpu, prev_cpu) @@ -626,7 +626,7 @@ Signed-off-by: Sebastian Andrzej Siewior } rcu_read_lock(); -@@ -7056,14 +7056,14 @@ int can_migrate_task(struct task_struct +@@ -7090,14 +7090,14 @@ int can_migrate_task(struct task_struct /* * We do not migrate tasks that are: * 1) throttled_lb_pair, or @@ -643,7 +643,7 @@ Signed-off-by: Sebastian Andrzej Siewior int cpu; schedstat_inc(p->se.statistics.nr_failed_migrations_affine); -@@ -7083,7 +7083,7 @@ int can_migrate_task(struct task_struct +@@ -7117,7 +7117,7 @@ int can_migrate_task(struct task_struct /* Prevent to re-select dst_cpu via env's CPUs: */ for_each_cpu_and(cpu, env->dst_grpmask, env->cpus) { @@ -652,7 +652,7 @@ Signed-off-by: Sebastian Andrzej Siewior env->flags |= LBF_DST_PINNED; env->new_dst_cpu = cpu; break; -@@ -7704,7 +7704,7 @@ check_cpu_capacity(struct rq *rq, struct +@@ -7738,7 +7738,7 @@ check_cpu_capacity(struct rq *rq, struct /* * Group imbalance indicates (and tries to solve) the problem where balancing @@ -661,7 +661,7 @@ Signed-off-by: Sebastian Andrzej Siewior * * Imagine a situation of two groups of 4 CPUs each and 4 tasks each with a * cpumask covering 1 CPU of the first group and 3 CPUs of the second group. -@@ -8319,7 +8319,7 @@ static struct sched_group *find_busiest_ +@@ -8353,7 +8353,7 @@ static struct sched_group *find_busiest_ /* * If the busiest group is imbalanced the below checks don't * work because they assume all things are equal, which typically @@ -670,7 +670,7 @@ Signed-off-by: Sebastian Andrzej Siewior */ if (busiest->group_type == group_imbalanced) goto force_balance; -@@ -8715,7 +8715,7 @@ static int load_balance(int this_cpu, st +@@ -8749,7 +8749,7 @@ static int load_balance(int this_cpu, st * if the curr task on busiest CPU can't be * moved to this_cpu: */ diff --git a/debian/patches-rt/kernel-sched-move-stack-kprobe-clean-up-to-__put_tas.patch b/debian/patches-rt/kernel-sched-move-stack-kprobe-clean-up-to-__put_tas.patch index 48385bea3..52a4e432e 100644 --- a/debian/patches-rt/kernel-sched-move-stack-kprobe-clean-up-to-__put_tas.patch +++ b/debian/patches-rt/kernel-sched-move-stack-kprobe-clean-up-to-__put_tas.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 21 Nov 2016 19:31:08 +0100 Subject: [PATCH] kernel/sched: move stack + kprobe clean up to __put_task_struct() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz There is no need to free the stack before the task struct (except for reasons mentioned in commit 68f24b08ee89 ("sched/core: Free the stack early if diff --git a/debian/patches-rt/kgb-serial-hackaround.patch b/debian/patches-rt/kgb-serial-hackaround.patch index dc9f2530d..87c7a8a0f 100644 --- a/debian/patches-rt/kgb-serial-hackaround.patch +++ b/debian/patches-rt/kgb-serial-hackaround.patch @@ -1,7 +1,7 @@ From: Jason Wessel Date: Thu, 28 Jul 2011 12:42:23 -0500 Subject: kgdb/serial: Short term workaround -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz On 07/27/2011 04:37 PM, Thomas Gleixner wrote: > - KGDB (not yet disabled) is reportedly unusable on -rt right now due @@ -63,7 +63,7 @@ Jason. char *help, short minlen) { return 0; } --- a/kernel/debug/kdb/kdb_io.c +++ b/kernel/debug/kdb/kdb_io.c -@@ -854,9 +854,11 @@ int kdb_printf(const char *fmt, ...) +@@ -857,9 +857,11 @@ int kdb_printf(const char *fmt, ...) va_list ap; int r; diff --git a/debian/patches-rt/kthread-convert-worker-lock-to-raw-spinlock.patch b/debian/patches-rt/kthread-convert-worker-lock-to-raw-spinlock.patch index 8fd814626..304909937 100644 --- a/debian/patches-rt/kthread-convert-worker-lock-to-raw-spinlock.patch +++ b/debian/patches-rt/kthread-convert-worker-lock-to-raw-spinlock.patch @@ -1,7 +1,7 @@ From: Julia Cartwright Date: Fri, 28 Sep 2018 21:03:51 +0000 Subject: [PATCH] kthread: convert worker lock to raw spinlock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz In order to enable the queuing of kthread work items from hardirq context even when PREEMPT_RT_FULL is enabled, convert the worker diff --git a/debian/patches-rt/leds-trigger-disable-CPU-trigger-on-RT.patch b/debian/patches-rt/leds-trigger-disable-CPU-trigger-on-RT.patch index 11084470b..bf360e33a 100644 --- a/debian/patches-rt/leds-trigger-disable-CPU-trigger-on-RT.patch +++ b/debian/patches-rt/leds-trigger-disable-CPU-trigger-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 23 Jan 2014 14:45:59 +0100 Subject: leds: trigger: disable CPU trigger on -RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz as it triggers: |CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.8-rt10 #141 diff --git a/debian/patches-rt/list_bl-fixup-bogus-lockdep-warning.patch b/debian/patches-rt/list_bl-fixup-bogus-lockdep-warning.patch index 20eba5c99..4d8d1cc61 100644 --- a/debian/patches-rt/list_bl-fixup-bogus-lockdep-warning.patch +++ b/debian/patches-rt/list_bl-fixup-bogus-lockdep-warning.patch @@ -1,7 +1,7 @@ From: Josh Cartwright Date: Thu, 31 Mar 2016 00:04:25 -0500 Subject: [PATCH] list_bl: fixup bogus lockdep warning -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz At first glance, the use of 'static inline' seems appropriate for INIT_HLIST_BL_HEAD(). diff --git a/debian/patches-rt/list_bl.h-make-list-head-locking-RT-safe.patch b/debian/patches-rt/list_bl.h-make-list-head-locking-RT-safe.patch index 02771650b..1c53bebf4 100644 --- a/debian/patches-rt/list_bl.h-make-list-head-locking-RT-safe.patch +++ b/debian/patches-rt/list_bl.h-make-list-head-locking-RT-safe.patch @@ -1,7 +1,7 @@ From: Paul Gortmaker Date: Fri, 21 Jun 2013 15:07:25 -0400 Subject: list_bl: Make list head locking RT safe -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz As per changes in include/linux/jbd_common.h for avoiding the bit_spin_locks on RT ("fs: jbd/jbd2: Make state lock and journal diff --git a/debian/patches-rt/locallock-provide-get-put-_locked_ptr-variants.patch b/debian/patches-rt/locallock-provide-get-put-_locked_ptr-variants.patch index 8078d4457..41e1967c8 100644 --- a/debian/patches-rt/locallock-provide-get-put-_locked_ptr-variants.patch +++ b/debian/patches-rt/locallock-provide-get-put-_locked_ptr-variants.patch @@ -1,7 +1,7 @@ From: Julia Cartwright Date: Mon, 7 May 2018 08:58:56 -0500 Subject: [PATCH] locallock: provide {get,put}_locked_ptr() variants -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Provide a set of locallocked accessors for pointers to per-CPU data; this is useful for dynamically-allocated per-CPU regions, for example. diff --git a/debian/patches-rt/localversion.patch b/debian/patches-rt/localversion.patch index 811a944ee..1cb115e21 100644 --- a/debian/patches-rt/localversion.patch +++ b/debian/patches-rt/localversion.patch @@ -1,7 +1,7 @@ Subject: Add localversion for -RT release From: Thomas Gleixner Date: Fri, 08 Jul 2011 20:25:16 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Signed-off-by: Thomas Gleixner --- @@ -11,4 +11,4 @@ Signed-off-by: Thomas Gleixner --- /dev/null +++ b/localversion-rt @@ -0,0 +1 @@ -+-rt4 ++-rt6 diff --git a/debian/patches-rt/lockdep-disable-self-test.patch b/debian/patches-rt/lockdep-disable-self-test.patch index 94b5de0a3..543b80743 100644 --- a/debian/patches-rt/lockdep-disable-self-test.patch +++ b/debian/patches-rt/lockdep-disable-self-test.patch @@ -4,7 +4,7 @@ Subject: [PATCH] lockdep: disable self-test MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The self-test wasn't always 100% accurate for RT. We disabled a few tests which failed because they had a different semantic for RT. Some diff --git a/debian/patches-rt/lockdep-no-softirq-accounting-on-rt.patch b/debian/patches-rt/lockdep-no-softirq-accounting-on-rt.patch index 17978321f..8f7eddfbf 100644 --- a/debian/patches-rt/lockdep-no-softirq-accounting-on-rt.patch +++ b/debian/patches-rt/lockdep-no-softirq-accounting-on-rt.patch @@ -1,7 +1,7 @@ Subject: lockdep: Make it RT aware From: Thomas Gleixner Date: Sun, 17 Jul 2011 18:51:23 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz teach lockdep that we don't really do softirqs on -RT. diff --git a/debian/patches-rt/lockdep-selftest-fix-warnings-due-to-missing-PREEMPT.patch b/debian/patches-rt/lockdep-selftest-fix-warnings-due-to-missing-PREEMPT.patch index 36933511f..e3c90cf32 100644 --- a/debian/patches-rt/lockdep-selftest-fix-warnings-due-to-missing-PREEMPT.patch +++ b/debian/patches-rt/lockdep-selftest-fix-warnings-due-to-missing-PREEMPT.patch @@ -1,7 +1,7 @@ From: Josh Cartwright Date: Wed, 28 Jan 2015 13:08:45 -0600 Subject: lockdep: selftest: fix warnings due to missing PREEMPT_RT conditionals -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz "lockdep: Selftest: Only do hardirq context test for raw spinlock" disabled the execution of certain tests with PREEMPT_RT_FULL, but did diff --git a/debian/patches-rt/lockdep-selftest-only-do-hardirq-context-test-for-raw-spinlock.patch b/debian/patches-rt/lockdep-selftest-only-do-hardirq-context-test-for-raw-spinlock.patch index 2e7a6687d..7b6dc16cd 100644 --- a/debian/patches-rt/lockdep-selftest-only-do-hardirq-context-test-for-raw-spinlock.patch +++ b/debian/patches-rt/lockdep-selftest-only-do-hardirq-context-test-for-raw-spinlock.patch @@ -1,7 +1,7 @@ Subject: lockdep: selftest: Only do hardirq context test for raw spinlock From: Yong Zhang Date: Mon, 16 Apr 2012 15:01:56 +0800 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz From: Yong Zhang diff --git a/debian/patches-rt/locking-don-t-check-for-__LINUX_SPINLOCK_TYPES_H-on-.patch b/debian/patches-rt/locking-don-t-check-for-__LINUX_SPINLOCK_TYPES_H-on-.patch index 8d6329580..92e62effc 100644 --- a/debian/patches-rt/locking-don-t-check-for-__LINUX_SPINLOCK_TYPES_H-on-.patch +++ b/debian/patches-rt/locking-don-t-check-for-__LINUX_SPINLOCK_TYPES_H-on-.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 4 Aug 2017 17:40:42 +0200 Subject: [PATCH 1/2] locking: don't check for __LINUX_SPINLOCK_TYPES_H on -RT archs -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Upstream uses arch_spinlock_t within spinlock_t and requests that spinlock_types.h header file is included first. diff --git a/debian/patches-rt/locking-locktorture-Do-NOT-include-rwlock.h-directly.patch b/debian/patches-rt/locking-locktorture-Do-NOT-include-rwlock.h-directly.patch index bce4ce8f5..8201ab24c 100644 --- a/debian/patches-rt/locking-locktorture-Do-NOT-include-rwlock.h-directly.patch +++ b/debian/patches-rt/locking-locktorture-Do-NOT-include-rwlock.h-directly.patch @@ -1,7 +1,7 @@ From: "Wolfgang M. Reimer" Date: Tue, 21 Jul 2015 16:20:07 +0200 Subject: locking: locktorture: Do NOT include rwlock.h directly -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Including rwlock.h directly will cause kernel builds to fail if CONFIG_PREEMPT_RT_FULL is defined. The correct header file diff --git a/debian/patches-rt/locking-rt-mutex-fix-deadlock-in-device-mapper-block.patch b/debian/patches-rt/locking-rt-mutex-fix-deadlock-in-device-mapper-block.patch index 0bd64b00f..8eee8d6ba 100644 --- a/debian/patches-rt/locking-rt-mutex-fix-deadlock-in-device-mapper-block.patch +++ b/debian/patches-rt/locking-rt-mutex-fix-deadlock-in-device-mapper-block.patch @@ -1,7 +1,7 @@ From: Mikulas Patocka Date: Mon, 13 Nov 2017 12:56:53 -0500 Subject: [PATCH] locking/rt-mutex: fix deadlock in device mapper / block-IO -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz When some block device driver creates a bio and submits it to another block device driver, the bio is added to current->bio_list (in order to diff --git a/debian/patches-rt/locking-rtmutex-re-init-the-wait_lock-in-rt_mutex_in.patch b/debian/patches-rt/locking-rtmutex-re-init-the-wait_lock-in-rt_mutex_in.patch index 91dc3e980..cd30dc6d6 100644 --- a/debian/patches-rt/locking-rtmutex-re-init-the-wait_lock-in-rt_mutex_in.patch +++ b/debian/patches-rt/locking-rtmutex-re-init-the-wait_lock-in-rt_mutex_in.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 16 Nov 2017 16:48:48 +0100 Subject: [PATCH] locking/rtmutex: re-init the wait_lock in rt_mutex_init_proxy_locked() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz We could provide a key-class for the lockdep (and fixup all callers) or move the init to all callers (like it was) in order to avoid lockdep diff --git a/debian/patches-rt/md-disable-bcache.patch b/debian/patches-rt/md-disable-bcache.patch index 8c5987205..ff880b49f 100644 --- a/debian/patches-rt/md-disable-bcache.patch +++ b/debian/patches-rt/md-disable-bcache.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 29 Aug 2013 11:48:57 +0200 Subject: md: disable bcache -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz It uses anon semaphores |drivers/md/bcache/request.c: In function ‘cached_dev_write_complete’: diff --git a/debian/patches-rt/md-raid5-percpu-handling-rt-aware.patch b/debian/patches-rt/md-raid5-percpu-handling-rt-aware.patch index 9cfcafb9d..1ef6125bb 100644 --- a/debian/patches-rt/md-raid5-percpu-handling-rt-aware.patch +++ b/debian/patches-rt/md-raid5-percpu-handling-rt-aware.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Tue, 6 Apr 2010 16:51:31 +0200 Subject: md: raid5: Make raid5_percpu handling RT aware -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz __raid_run_ops() disables preemption with get_cpu() around the access to the raid5_percpu variables. That causes scheduling while atomic diff --git a/debian/patches-rt/mips-disable-highmem-on-rt.patch b/debian/patches-rt/mips-disable-highmem-on-rt.patch index 4341d2441..2d63fcff2 100644 --- a/debian/patches-rt/mips-disable-highmem-on-rt.patch +++ b/debian/patches-rt/mips-disable-highmem-on-rt.patch @@ -1,7 +1,7 @@ Subject: mips: Disable highmem on RT From: Thomas Gleixner Date: Mon, 18 Jul 2011 17:10:12 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The current highmem handling on -RT is not compatible and needs fixups. diff --git a/debian/patches-rt/mm-convert-swap-to-percpu-locked.patch b/debian/patches-rt/mm-convert-swap-to-percpu-locked.patch index cf03068e9..6c265476a 100644 --- a/debian/patches-rt/mm-convert-swap-to-percpu-locked.patch +++ b/debian/patches-rt/mm-convert-swap-to-percpu-locked.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:29:51 -0500 Subject: mm/swap: Convert to percpu locked -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Replace global locks (get_cpu + local_irq_save) with "local_locks()". Currently there is one of for "rotate" and one for "swap". @@ -53,7 +53,7 @@ Signed-off-by: Thomas Gleixner } --- a/mm/page_alloc.c +++ b/mm/page_alloc.c -@@ -7184,8 +7184,9 @@ void __init free_area_init(unsigned long +@@ -7182,8 +7182,9 @@ void __init free_area_init(unsigned long static int page_alloc_cpu_dead(unsigned int cpu) { diff --git a/debian/patches-rt/mm-disable-sloub-rt.patch b/debian/patches-rt/mm-disable-sloub-rt.patch index 81820c1cc..1055a2a67 100644 --- a/debian/patches-rt/mm-disable-sloub-rt.patch +++ b/debian/patches-rt/mm-disable-sloub-rt.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:44:03 -0500 Subject: mm: Allow only slub on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Disable SLAB and SLOB on -RT. Only SLUB is adopted to -RT needs. diff --git a/debian/patches-rt/mm-enable-slub.patch b/debian/patches-rt/mm-enable-slub.patch index 5f21f0f5d..b6520b5eb 100644 --- a/debian/patches-rt/mm-enable-slub.patch +++ b/debian/patches-rt/mm-enable-slub.patch @@ -1,7 +1,7 @@ Subject: mm: Enable SLUB for RT From: Thomas Gleixner Date: Thu, 25 Oct 2012 10:32:35 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Avoid the memory allocation in IRQ section diff --git a/debian/patches-rt/mm-kasan-make-quarantine_lock-a-raw_spinlock_t.patch b/debian/patches-rt/mm-kasan-make-quarantine_lock-a-raw_spinlock_t.patch index 1c15295a2..4a597430d 100644 --- a/debian/patches-rt/mm-kasan-make-quarantine_lock-a-raw_spinlock_t.patch +++ b/debian/patches-rt/mm-kasan-make-quarantine_lock-a-raw_spinlock_t.patch @@ -1,7 +1,7 @@ From: Clark Williams Date: Tue, 18 Sep 2018 10:29:31 -0500 Subject: [PATCH] mm/kasan: make quarantine_lock a raw_spinlock_t -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The static lock quarantine_lock is used in quarantine.c to protect the quarantine queue datastructures. It is taken inside quarantine queue diff --git a/debian/patches-rt/mm-make-vmstat-rt-aware.patch b/debian/patches-rt/mm-make-vmstat-rt-aware.patch index f6161db87..84ad70d7c 100644 --- a/debian/patches-rt/mm-make-vmstat-rt-aware.patch +++ b/debian/patches-rt/mm-make-vmstat-rt-aware.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:30:13 -0500 Subject: mm/vmstat: Protect per cpu variables with preempt disable on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Disable preemption on -RT for the vmstat code. On vanila the code runs in IRQ-off regions while on -RT it is not. "preempt_disable" ensures that the diff --git a/debian/patches-rt/mm-memcontrol-Don-t-call-schedule_work_on-in-preempt.patch b/debian/patches-rt/mm-memcontrol-Don-t-call-schedule_work_on-in-preempt.patch index 64e539f6e..4fa847ae7 100644 --- a/debian/patches-rt/mm-memcontrol-Don-t-call-schedule_work_on-in-preempt.patch +++ b/debian/patches-rt/mm-memcontrol-Don-t-call-schedule_work_on-in-preempt.patch @@ -1,7 +1,7 @@ From: Yang Shi Subject: mm/memcontrol: Don't call schedule_work_on in preemption disabled context Date: Wed, 30 Oct 2013 11:48:33 -0700 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The following trace is triggered when running ltp oom test cases: diff --git a/debian/patches-rt/mm-memcontrol-do_not_disable_irq.patch b/debian/patches-rt/mm-memcontrol-do_not_disable_irq.patch index 4c923f276..e7d70cad5 100644 --- a/debian/patches-rt/mm-memcontrol-do_not_disable_irq.patch +++ b/debian/patches-rt/mm-memcontrol-do_not_disable_irq.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Subject: mm/memcontrol: Replace local_irq_disable with local locks Date: Wed, 28 Jan 2015 17:14:16 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz There are a few local_irq_disable() which then take sleeping locks. This patch converts them local locks. diff --git a/debian/patches-rt/mm-page_alloc-rt-friendly-per-cpu-pages.patch b/debian/patches-rt/mm-page_alloc-rt-friendly-per-cpu-pages.patch index 090e0045a..4e95e377f 100644 --- a/debian/patches-rt/mm-page_alloc-rt-friendly-per-cpu-pages.patch +++ b/debian/patches-rt/mm-page_alloc-rt-friendly-per-cpu-pages.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:29:37 -0500 Subject: mm: page_alloc: rt-friendly per-cpu pages -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz rt-friendly per-cpu pages: convert the irqs-off per-cpu locking method into a preemptible, explicit-per-cpu-locks method. @@ -213,7 +213,7 @@ Signed-off-by: Thomas Gleixner return NULL; } -@@ -8062,7 +8085,7 @@ void zone_pcp_reset(struct zone *zone) +@@ -8068,7 +8091,7 @@ void zone_pcp_reset(struct zone *zone) struct per_cpu_pageset *pset; /* avoid races with drain_pages() */ @@ -222,7 +222,7 @@ Signed-off-by: Thomas Gleixner if (zone->pageset != &boot_pageset) { for_each_online_cpu(cpu) { pset = per_cpu_ptr(zone->pageset, cpu); -@@ -8071,7 +8094,7 @@ void zone_pcp_reset(struct zone *zone) +@@ -8077,7 +8100,7 @@ void zone_pcp_reset(struct zone *zone) free_percpu(zone->pageset); zone->pageset = &boot_pageset; } diff --git a/debian/patches-rt/mm-perform-lru_add_drain_all-remotely.patch b/debian/patches-rt/mm-perform-lru_add_drain_all-remotely.patch index 3b8f896f6..dac286d8f 100644 --- a/debian/patches-rt/mm-perform-lru_add_drain_all-remotely.patch +++ b/debian/patches-rt/mm-perform-lru_add_drain_all-remotely.patch @@ -1,7 +1,7 @@ From: Luiz Capitulino Date: Fri, 27 May 2016 15:03:28 +0200 Subject: [PATCH] mm: perform lru_add_drain_all() remotely -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz lru_add_drain_all() works by scheduling lru_add_drain_cpu() to run on all CPUs that have non-empty LRU pagevecs and then waiting for diff --git a/debian/patches-rt/mm-protect-activate-switch-mm.patch b/debian/patches-rt/mm-protect-activate-switch-mm.patch index 565c7f64a..5436260f4 100644 --- a/debian/patches-rt/mm-protect-activate-switch-mm.patch +++ b/debian/patches-rt/mm-protect-activate-switch-mm.patch @@ -1,7 +1,7 @@ From: Yong Zhang Date: Tue, 15 May 2012 13:53:56 +0800 Subject: mm: Protect activate_mm() by preempt_[disable&enable]_rt() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz User preempt_*_rt instead of local_irq_*_rt or otherwise there will be warning on ARM like below: diff --git a/debian/patches-rt/mm-rt-kmap-atomic-scheduling.patch b/debian/patches-rt/mm-rt-kmap-atomic-scheduling.patch index 39e249389..f1246c207 100644 --- a/debian/patches-rt/mm-rt-kmap-atomic-scheduling.patch +++ b/debian/patches-rt/mm-rt-kmap-atomic-scheduling.patch @@ -1,7 +1,7 @@ Subject: mm, rt: kmap_atomic scheduling From: Peter Zijlstra Date: Thu, 28 Jul 2011 10:43:51 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz In fact, with migrate_disable() existing one could play games with kmap_atomic. You could save/restore the kmap_atomic slots on context @@ -39,7 +39,7 @@ Link: http://lkml.kernel.org/r/1311842631.5890.208.camel@twins #include #include -@@ -196,6 +197,35 @@ start_thread(struct pt_regs *regs, unsig +@@ -198,6 +199,35 @@ start_thread(struct pt_regs *regs, unsig } EXPORT_SYMBOL_GPL(start_thread); @@ -75,9 +75,9 @@ Link: http://lkml.kernel.org/r/1311842631.5890.208.camel@twins /* * switch_to(x,y) should switch tasks from x to y. -@@ -271,6 +301,8 @@ EXPORT_SYMBOL_GPL(start_thread); - task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT)) - __switch_to_xtra(prev_p, next_p, tss); +@@ -267,6 +297,8 @@ EXPORT_SYMBOL_GPL(start_thread); + + switch_to_extra(prev_p, next_p); + switch_kmaps(prev_p, next_p); + @@ -248,7 +248,7 @@ Link: http://lkml.kernel.org/r/1311842631.5890.208.camel@twins /* task_struct member predeclarations (sorted alphabetically): */ struct audit_context; -@@ -1205,6 +1206,12 @@ struct task_struct { +@@ -1206,6 +1207,12 @@ struct task_struct { int softirq_nestcnt; unsigned int softirqs_raised; #endif diff --git a/debian/patches-rt/mm-scatterlist-dont-disable-irqs-on-RT.patch b/debian/patches-rt/mm-scatterlist-dont-disable-irqs-on-RT.patch index 9d71b934d..2a3946921 100644 --- a/debian/patches-rt/mm-scatterlist-dont-disable-irqs-on-RT.patch +++ b/debian/patches-rt/mm-scatterlist-dont-disable-irqs-on-RT.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 3 Jul 2009 08:44:34 -0500 Subject: mm/scatterlist: Do not disable irqs on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz For -RT it is enough to keep pagefault disabled (which is currently handled by kmap_atomic()). diff --git a/debian/patches-rt/mm-vmalloc-use-get-cpu-light.patch b/debian/patches-rt/mm-vmalloc-use-get-cpu-light.patch index ca0a6e2ec..00ee45ad1 100644 --- a/debian/patches-rt/mm-vmalloc-use-get-cpu-light.patch +++ b/debian/patches-rt/mm-vmalloc-use-get-cpu-light.patch @@ -1,7 +1,7 @@ Subject: mm/vmalloc: Another preempt disable region which sucks From: Thomas Gleixner Date: Tue, 12 Jul 2011 11:39:36 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Avoid the preempt disable version of get_cpu_var(). The inner-lock should provide enough serialisation. diff --git a/debian/patches-rt/mm_zsmalloc_copy_with_get_cpu_var_and_locking.patch b/debian/patches-rt/mm_zsmalloc_copy_with_get_cpu_var_and_locking.patch index 4c6e5fa8d..4fd7bf7c1 100644 --- a/debian/patches-rt/mm_zsmalloc_copy_with_get_cpu_var_and_locking.patch +++ b/debian/patches-rt/mm_zsmalloc_copy_with_get_cpu_var_and_locking.patch @@ -1,7 +1,7 @@ From: Mike Galbraith Date: Tue, 22 Mar 2016 11:16:09 +0100 Subject: [PATCH] mm/zsmalloc: copy with get_cpu_var() and locking -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz get_cpu_var() disables preemption and triggers a might_sleep() splat later. This is replaced with get_locked_var(). diff --git a/debian/patches-rt/mutex-no-spin-on-rt.patch b/debian/patches-rt/mutex-no-spin-on-rt.patch index dc3863dc2..ae9e8adb8 100644 --- a/debian/patches-rt/mutex-no-spin-on-rt.patch +++ b/debian/patches-rt/mutex-no-spin-on-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Sun, 17 Jul 2011 21:51:45 +0200 Subject: locking: Disable spin on owner for RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Drop spin on owner for mutex / rwsem. We are most likely not using it but… diff --git a/debian/patches-rt/net-Have-__napi_schedule_irqoff-disable-interrupts-o.patch b/debian/patches-rt/net-Have-__napi_schedule_irqoff-disable-interrupts-o.patch index 52e0e88db..d9302160d 100644 --- a/debian/patches-rt/net-Have-__napi_schedule_irqoff-disable-interrupts-o.patch +++ b/debian/patches-rt/net-Have-__napi_schedule_irqoff-disable-interrupts-o.patch @@ -2,7 +2,7 @@ From: Steven Rostedt Date: Tue, 6 Dec 2016 17:50:30 -0500 Subject: [PATCH] net: Have __napi_schedule_irqoff() disable interrupts on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz A customer hit a crash where the napi sd->poll_list became corrupted. The customer had the bnx2x driver, which does a @@ -51,7 +51,7 @@ Signed-off-by: Sebastian Andrzej Siewior { --- a/net/core/dev.c +++ b/net/core/dev.c -@@ -5927,6 +5927,7 @@ bool napi_schedule_prep(struct napi_stru +@@ -5931,6 +5931,7 @@ bool napi_schedule_prep(struct napi_stru } EXPORT_SYMBOL(napi_schedule_prep); @@ -59,7 +59,7 @@ Signed-off-by: Sebastian Andrzej Siewior /** * __napi_schedule_irqoff - schedule for receive * @n: entry to schedule -@@ -5938,6 +5939,7 @@ void __napi_schedule_irqoff(struct napi_ +@@ -5942,6 +5943,7 @@ void __napi_schedule_irqoff(struct napi_ ____napi_schedule(this_cpu_ptr(&softnet_data), n); } EXPORT_SYMBOL(__napi_schedule_irqoff); diff --git a/debian/patches-rt/net-Qdisc-use-a-seqlock-instead-seqcount.patch b/debian/patches-rt/net-Qdisc-use-a-seqlock-instead-seqcount.patch index cc6e1fadb..81f1a4740 100644 --- a/debian/patches-rt/net-Qdisc-use-a-seqlock-instead-seqcount.patch +++ b/debian/patches-rt/net-Qdisc-use-a-seqlock-instead-seqcount.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 14 Sep 2016 17:36:35 +0200 Subject: [PATCH] net/Qdisc: use a seqlock instead seqcount -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The seqcount disables preemption on -RT while it is held which can't remove. Also we don't want the reader to spin for ages if the writer is diff --git a/debian/patches-rt/net-add-a-lock-around-icmp_sk.patch b/debian/patches-rt/net-add-a-lock-around-icmp_sk.patch index 4d5b39fc8..a91e3b698 100644 --- a/debian/patches-rt/net-add-a-lock-around-icmp_sk.patch +++ b/debian/patches-rt/net-add-a-lock-around-icmp_sk.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 31 Aug 2016 17:54:09 +0200 Subject: [PATCH] net: add a lock around icmp_sk() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz It looks like the this_cpu_ptr() access in icmp_sk() is protected with local_bh_disable(). To avoid missing serialization in -RT I am adding diff --git a/debian/patches-rt/net-add-back-the-missing-serialization-in-ip_send_un.patch b/debian/patches-rt/net-add-back-the-missing-serialization-in-ip_send_un.patch index 4a025f5eb..24ce37533 100644 --- a/debian/patches-rt/net-add-back-the-missing-serialization-in-ip_send_un.patch +++ b/debian/patches-rt/net-add-back-the-missing-serialization-in-ip_send_un.patch @@ -5,7 +5,7 @@ Subject: [PATCH] net: add back the missing serialization in MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Some time ago Sami Pietikäinen reported a crash on -RT in ip_send_unicast_reply() which was later fixed by Nicholas Mc Guire diff --git a/debian/patches-rt/net-another-local-irq-disable-alloc-atomic-headache.patch b/debian/patches-rt/net-another-local-irq-disable-alloc-atomic-headache.patch index 832bea6b1..175e853d3 100644 --- a/debian/patches-rt/net-another-local-irq-disable-alloc-atomic-headache.patch +++ b/debian/patches-rt/net-another-local-irq-disable-alloc-atomic-headache.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Wed, 26 Sep 2012 16:21:08 +0200 Subject: net: Another local_irq_disable/kmalloc headache -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Replace it by a local lock. Though that's pretty inefficient :( diff --git a/debian/patches-rt/net-core-protect-users-of-napi_alloc_cache-against-r.patch b/debian/patches-rt/net-core-protect-users-of-napi_alloc_cache-against-r.patch index fa10d68f2..2ffe2a4c7 100644 --- a/debian/patches-rt/net-core-protect-users-of-napi_alloc_cache-against-r.patch +++ b/debian/patches-rt/net-core-protect-users-of-napi_alloc_cache-against-r.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 15 Jan 2016 16:33:34 +0100 Subject: net/core: protect users of napi_alloc_cache against reentrance -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz On -RT the code running in BH can not be moved to another CPU so CPU local variable remain local. However the code can be preempted diff --git a/debian/patches-rt/net-core-use-local_bh_disable-in-netif_rx_ni.patch b/debian/patches-rt/net-core-use-local_bh_disable-in-netif_rx_ni.patch index 0d0fd8244..40c5ee368 100644 --- a/debian/patches-rt/net-core-use-local_bh_disable-in-netif_rx_ni.patch +++ b/debian/patches-rt/net-core-use-local_bh_disable-in-netif_rx_ni.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 16 Jun 2017 19:03:16 +0200 Subject: [PATCH] net/core: use local_bh_disable() in netif_rx_ni() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz In 2004 netif_rx_ni() gained a preempt_disable() section around netif_rx() and its do_softirq() + testing for it. The do_softirq() part diff --git a/debian/patches-rt/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch b/debian/patches-rt/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch index 1a9c0afb0..86e76f18a 100644 --- a/debian/patches-rt/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch +++ b/debian/patches-rt/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 30 Mar 2016 13:36:29 +0200 Subject: [PATCH] net: dev: always take qdisc's busylock in __dev_xmit_skb() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The root-lock is dropped before dev_hard_start_xmit() is invoked and after setting the __QDISC___STATE_RUNNING bit. If this task is now pushed away diff --git a/debian/patches-rt/net-fix-iptable-xt-write-recseq-begin-rt-fallout.patch b/debian/patches-rt/net-fix-iptable-xt-write-recseq-begin-rt-fallout.patch index 4ac34112f..d3907bcc4 100644 --- a/debian/patches-rt/net-fix-iptable-xt-write-recseq-begin-rt-fallout.patch +++ b/debian/patches-rt/net-fix-iptable-xt-write-recseq-begin-rt-fallout.patch @@ -1,7 +1,7 @@ Subject: net: netfilter: Serialize xt_write_recseq sections on RT From: Thomas Gleixner Date: Sun, 28 Oct 2012 11:18:08 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The netfilter code relies only on the implicit semantics of local_bh_disable() for serializing wt_write_recseq sections. RT breaks diff --git a/debian/patches-rt/net-make-devnet_rename_seq-a-mutex.patch b/debian/patches-rt/net-make-devnet_rename_seq-a-mutex.patch index aa784d60f..c4bcccef9 100644 --- a/debian/patches-rt/net-make-devnet_rename_seq-a-mutex.patch +++ b/debian/patches-rt/net-make-devnet_rename_seq-a-mutex.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 20 Mar 2013 18:06:20 +0100 Subject: net: Add a mutex around devnet_rename_seq -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz On RT write_seqcount_begin() disables preemption and device_rename() allocates memory with GFP_KERNEL and grabs later the sysfs_mutex diff --git a/debian/patches-rt/net-move-xmit_recursion-to-per-task-variable-on-RT.patch b/debian/patches-rt/net-move-xmit_recursion-to-per-task-variable-on-RT.patch index 742c2d988..46e2946a6 100644 --- a/debian/patches-rt/net-move-xmit_recursion-to-per-task-variable-on-RT.patch +++ b/debian/patches-rt/net-move-xmit_recursion-to-per-task-variable-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 13 Jan 2016 15:55:02 +0100 Subject: net: move xmit_recursion to per-task variable on -RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz A softirq on -RT can be preempted. That means one task is in __dev_queue_xmit(), gets preempted and another task may enter @@ -182,7 +182,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/include/linux/sched.h +++ b/include/linux/sched.h -@@ -1208,6 +1208,9 @@ struct task_struct { +@@ -1209,6 +1209,9 @@ struct task_struct { #ifdef CONFIG_DEBUG_ATOMIC_SLEEP unsigned long task_state_change; #endif @@ -232,7 +232,7 @@ Signed-off-by: Sebastian Andrzej Siewior if (dev_xmit_complete(rc)) { HARD_TX_UNLOCK(dev, txq); goto out; -@@ -8360,7 +8365,7 @@ static void netdev_init_one_queue(struct +@@ -8367,7 +8372,7 @@ static void netdev_init_one_queue(struct /* Initialize queue lock */ spin_lock_init(&queue->_xmit_lock); netdev_set_xmit_lockdep_class(&queue->_xmit_lock, dev->type); diff --git a/debian/patches-rt/net-provide-a-way-to-delegate-processing-a-softirq-t.patch b/debian/patches-rt/net-provide-a-way-to-delegate-processing-a-softirq-t.patch index fb2405027..4982e3253 100644 --- a/debian/patches-rt/net-provide-a-way-to-delegate-processing-a-softirq-t.patch +++ b/debian/patches-rt/net-provide-a-way-to-delegate-processing-a-softirq-t.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 20 Jan 2016 15:39:05 +0100 Subject: net: provide a way to delegate processing a softirq to ksoftirqd -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz If the NET_RX uses up all of his budget it moves the following NAPI invocations into the `ksoftirqd`. On -RT it does not do so. Instead it @@ -68,7 +68,7 @@ Signed-off-by: Sebastian Andrzej Siewior void raise_softirq_irqoff(unsigned int nr) --- a/net/core/dev.c +++ b/net/core/dev.c -@@ -6354,7 +6354,7 @@ static __latent_entropy void net_rx_acti +@@ -6361,7 +6361,7 @@ static __latent_entropy void net_rx_acti list_splice_tail(&repoll, &list); list_splice(&list, &sd->poll_list); if (!list_empty(&sd->poll_list)) diff --git a/debian/patches-rt/net-sched-dev_deactivate_many-use-msleep-1-instead-o.patch b/debian/patches-rt/net-sched-dev_deactivate_many-use-msleep-1-instead-o.patch index 13747e469..784a6efbf 100644 --- a/debian/patches-rt/net-sched-dev_deactivate_many-use-msleep-1-instead-o.patch +++ b/debian/patches-rt/net-sched-dev_deactivate_many-use-msleep-1-instead-o.patch @@ -1,7 +1,7 @@ From: Marc Kleine-Budde Date: Wed, 5 Mar 2014 00:49:47 +0100 Subject: net: sched: Use msleep() instead of yield() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz On PREEMPT_RT enabled systems the interrupt handler run as threads at prio 50 (by default). If a high priority userspace process tries to shut down a busy diff --git a/debian/patches-rt/net-use-cpu-chill.patch b/debian/patches-rt/net-use-cpu-chill.patch index 9ff8b638f..97a839786 100644 --- a/debian/patches-rt/net-use-cpu-chill.patch +++ b/debian/patches-rt/net-use-cpu-chill.patch @@ -1,7 +1,7 @@ Subject: net: Use cpu_chill() instead of cpu_relax() From: Thomas Gleixner Date: Wed, 07 Mar 2012 21:10:04 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Retry loops on RT might loop forever when the modifying side was preempted. Use cpu_chill() instead of cpu_relax() to let the system diff --git a/debian/patches-rt/net_disable_NET_RX_BUSY_POLL.patch b/debian/patches-rt/net_disable_NET_RX_BUSY_POLL.patch index 7526239bc..14ace0d09 100644 --- a/debian/patches-rt/net_disable_NET_RX_BUSY_POLL.patch +++ b/debian/patches-rt/net_disable_NET_RX_BUSY_POLL.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Sat, 27 May 2017 19:02:06 +0200 Subject: net/core: disable NET_RX_BUSY_POLL -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz sk_busy_loop() does preempt_disable() followed by a few operations which can take sleeping locks and may get long. diff --git a/debian/patches-rt/of-allocate-free-phandle-cache-outside-of-the-devtre.patch b/debian/patches-rt/of-allocate-free-phandle-cache-outside-of-the-devtre.patch index 0a1ce3924..93abfbcd1 100644 --- a/debian/patches-rt/of-allocate-free-phandle-cache-outside-of-the-devtre.patch +++ b/debian/patches-rt/of-allocate-free-phandle-cache-outside-of-the-devtre.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 31 Aug 2018 14:16:30 +0200 Subject: [PATCH] of: allocate / free phandle cache outside of the devtree_lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The phandle cache code allocates memory while holding devtree_lock which is a raw_spinlock_t. Memory allocation (and free()) is not possible on @@ -18,7 +18,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/drivers/of/base.c +++ b/drivers/of/base.c -@@ -130,46 +130,52 @@ void of_populate_phandle_cache(void) +@@ -132,46 +132,52 @@ void of_populate_phandle_cache(void) u32 cache_entries; struct device_node *np; u32 phandles = 0; diff --git a/debian/patches-rt/oleg-signal-rt-fix.patch b/debian/patches-rt/oleg-signal-rt-fix.patch index 3979a7b47..c0fc75e67 100644 --- a/debian/patches-rt/oleg-signal-rt-fix.patch +++ b/debian/patches-rt/oleg-signal-rt-fix.patch @@ -1,7 +1,7 @@ From: Oleg Nesterov Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: signal/x86: Delay calling signals in atomic -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz On x86_64 we must disable preemption before we enable interrupts for stack faults, int3 and debugging, because the current task is using diff --git a/debian/patches-rt/panic-disable-random-on-rt.patch b/debian/patches-rt/panic-disable-random-on-rt.patch index 48fe68432..dec66b740 100644 --- a/debian/patches-rt/panic-disable-random-on-rt.patch +++ b/debian/patches-rt/panic-disable-random-on-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: panic: skip get_random_bytes for RT_FULL in init_oops_id -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Disable on -RT. If this is invoked from irq-context we will have problems to acquire the sleeping lock. diff --git a/debian/patches-rt/patch-to-introduce-rcu-bh-qs-where-safe-from-softirq.patch b/debian/patches-rt/patch-to-introduce-rcu-bh-qs-where-safe-from-softirq.patch index 8e3f04a9f..1d488367e 100644 --- a/debian/patches-rt/patch-to-introduce-rcu-bh-qs-where-safe-from-softirq.patch +++ b/debian/patches-rt/patch-to-introduce-rcu-bh-qs-where-safe-from-softirq.patch @@ -1,7 +1,7 @@ Subject: rcu: Make ksoftirqd do RCU quiescent states From: "Paul E. McKenney" Date: Wed, 5 Oct 2011 11:45:18 -0700 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Implementing RCU-bh in terms of RCU-preempt makes the system vulnerable to network-based denial-of-service attacks. This patch therefore diff --git a/debian/patches-rt/pci-switchtec-Don-t-use-completion-s-wait-queue.patch b/debian/patches-rt/pci-switchtec-Don-t-use-completion-s-wait-queue.patch index ac329238b..11da57c4a 100644 --- a/debian/patches-rt/pci-switchtec-Don-t-use-completion-s-wait-queue.patch +++ b/debian/patches-rt/pci-switchtec-Don-t-use-completion-s-wait-queue.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 4 Oct 2017 10:24:23 +0200 Subject: [PATCH] pci/switchtec: Don't use completion's wait queue -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The poll callback is using completion's wait_queue_head_t member and puts it in poll_wait() so the poll() caller gets a wakeup after command diff --git a/debian/patches-rt/percpu-include-irqflags.h-for-raw_local_irq_save.patch b/debian/patches-rt/percpu-include-irqflags.h-for-raw_local_irq_save.patch index afe8523a1..c8bf7a9ac 100644 --- a/debian/patches-rt/percpu-include-irqflags.h-for-raw_local_irq_save.patch +++ b/debian/patches-rt/percpu-include-irqflags.h-for-raw_local_irq_save.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 11 Oct 2018 16:39:59 +0200 Subject: [PATCH] percpu: include irqflags.h for raw_local_irq_save() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The header percpu.h header file is using raw_local_irq_save() but does not include irqflags.h for its definition. It compiles because the diff --git a/debian/patches-rt/peter_zijlstra-frob-rcu.patch b/debian/patches-rt/peter_zijlstra-frob-rcu.patch index a7f4ed460..8c757e831 100644 --- a/debian/patches-rt/peter_zijlstra-frob-rcu.patch +++ b/debian/patches-rt/peter_zijlstra-frob-rcu.patch @@ -1,7 +1,7 @@ Subject: rcu: Frob softirq test From: Peter Zijlstra Date: Sat Aug 13 00:23:17 CEST 2011 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz With RT_FULL we get the below wreckage: diff --git a/debian/patches-rt/peterz-percpu-rwsem-rt.patch b/debian/patches-rt/peterz-percpu-rwsem-rt.patch index df891dd53..880b64f74 100644 --- a/debian/patches-rt/peterz-percpu-rwsem-rt.patch +++ b/debian/patches-rt/peterz-percpu-rwsem-rt.patch @@ -1,7 +1,7 @@ Subject: locking/percpu-rwsem: Remove preempt_disable variants From: Peter Zijlstra Date: Wed Nov 23 16:29:32 CET 2016 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Effective revert commit: diff --git a/debian/patches-rt/pid.h-include-atomic.h.patch b/debian/patches-rt/pid.h-include-atomic.h.patch index ddbd965ff..10db59afb 100644 --- a/debian/patches-rt/pid.h-include-atomic.h.patch +++ b/debian/patches-rt/pid.h-include-atomic.h.patch @@ -1,7 +1,7 @@ From: Grygorii Strashko Date: Tue, 21 Jul 2015 19:43:56 +0300 Subject: pid.h: include atomic.h -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz This patch fixes build error: CC kernel/pid_namespace.o diff --git a/debian/patches-rt/pinctrl-bcm2835-Use-raw-spinlock-for-RT-compatibilit.patch b/debian/patches-rt/pinctrl-bcm2835-Use-raw-spinlock-for-RT-compatibilit.patch index b803238d2..62c0100d9 100644 --- a/debian/patches-rt/pinctrl-bcm2835-Use-raw-spinlock-for-RT-compatibilit.patch +++ b/debian/patches-rt/pinctrl-bcm2835-Use-raw-spinlock-for-RT-compatibilit.patch @@ -1,7 +1,7 @@ From: Lukas Wunner Date: Sat, 27 Oct 2018 10:15:33 +0200 Subject: [PATCH] pinctrl: bcm2835: Use raw spinlock for RT compatibility -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz [Upstream commit 71dfaa749f2f7c1722ebf6716d3f797a04528cba] diff --git a/debian/patches-rt/posix-timers-thread-posix-cpu-timers-on-rt.patch b/debian/patches-rt/posix-timers-thread-posix-cpu-timers-on-rt.patch index 6184e103c..bf2a323a6 100644 --- a/debian/patches-rt/posix-timers-thread-posix-cpu-timers-on-rt.patch +++ b/debian/patches-rt/posix-timers-thread-posix-cpu-timers-on-rt.patch @@ -1,7 +1,7 @@ From: John Stultz Date: Fri, 3 Jul 2009 08:29:58 -0500 Subject: posix-timers: Thread posix-cpu-timers on -rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz posix-cpu-timer code takes non -rt safe locks in hard irq context. Move it to a thread. diff --git a/debian/patches-rt/power-disable-highmem-on-rt.patch b/debian/patches-rt/power-disable-highmem-on-rt.patch index 0f42ee87a..0acc6b595 100644 --- a/debian/patches-rt/power-disable-highmem-on-rt.patch +++ b/debian/patches-rt/power-disable-highmem-on-rt.patch @@ -1,7 +1,7 @@ Subject: powerpc: Disable highmem on RT From: Thomas Gleixner Date: Mon, 18 Jul 2011 17:08:34 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The current highmem handling on -RT is not compatible and needs fixups. diff --git a/debian/patches-rt/power-use-generic-rwsem-on-rt.patch b/debian/patches-rt/power-use-generic-rwsem-on-rt.patch index 2522e7434..99084ba0c 100644 --- a/debian/patches-rt/power-use-generic-rwsem-on-rt.patch +++ b/debian/patches-rt/power-use-generic-rwsem-on-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: powerpc: Use generic rwsem on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Use generic code which uses rtmutex diff --git a/debian/patches-rt/powerpc-kvm-Disable-in-kernel-MPIC-emulation-for-PRE.patch b/debian/patches-rt/powerpc-kvm-Disable-in-kernel-MPIC-emulation-for-PRE.patch index 38e1d0c80..ffd0a8ffe 100644 --- a/debian/patches-rt/powerpc-kvm-Disable-in-kernel-MPIC-emulation-for-PRE.patch +++ b/debian/patches-rt/powerpc-kvm-Disable-in-kernel-MPIC-emulation-for-PRE.patch @@ -1,7 +1,7 @@ From: Bogdan Purcareata Date: Fri, 24 Apr 2015 15:53:13 +0000 Subject: powerpc/kvm: Disable in-kernel MPIC emulation for PREEMPT_RT_FULL -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz While converting the openpic emulation code to use a raw_spinlock_t enables guests to run on RT, there's still a performance issue. For interrupts sent in diff --git a/debian/patches-rt/powerpc-preempt-lazy-support.patch b/debian/patches-rt/powerpc-preempt-lazy-support.patch index 04343088a..e1b250b42 100644 --- a/debian/patches-rt/powerpc-preempt-lazy-support.patch +++ b/debian/patches-rt/powerpc-preempt-lazy-support.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 1 Nov 2012 10:14:11 +0100 Subject: powerpc: Add support for lazy preemption -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Implement the powerpc pieces for lazy preempt. diff --git a/debian/patches-rt/preempt-lazy-support.patch b/debian/patches-rt/preempt-lazy-support.patch index 80a8b7b0e..f34bf3164 100644 --- a/debian/patches-rt/preempt-lazy-support.patch +++ b/debian/patches-rt/preempt-lazy-support.patch @@ -1,7 +1,7 @@ Subject: sched: Add support for lazy preemption From: Thomas Gleixner Date: Fri, 26 Oct 2012 18:50:54 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz It has become an obsession to mitigate the determinism vs. throughput loss of RT. Looking at the mainline semantics of preemption points @@ -142,7 +142,7 @@ Signed-off-by: Thomas Gleixner --- a/include/linux/sched.h +++ b/include/linux/sched.h -@@ -1715,6 +1715,44 @@ static inline int test_tsk_need_resched( +@@ -1725,6 +1725,44 @@ static inline int test_tsk_need_resched( return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED)); } @@ -235,7 +235,7 @@ Signed-off-by: Thomas Gleixner default PREEMPT_NONE --- a/kernel/cpu.c +++ b/kernel/cpu.c -@@ -303,11 +303,13 @@ void pin_current_cpu(void) +@@ -304,11 +304,13 @@ void pin_current_cpu(void) return; } cpu = smp_processor_id(); @@ -380,7 +380,7 @@ Signed-off-by: Thomas Gleixner /* * The idle tasks have their own, simple scheduling class: */ -@@ -7176,6 +7252,7 @@ void migrate_disable(void) +@@ -7182,6 +7258,7 @@ void migrate_disable(void) } preempt_disable(); @@ -388,7 +388,7 @@ Signed-off-by: Thomas Gleixner pin_current_cpu(); migrate_disable_update_cpus_allowed(p); -@@ -7243,6 +7320,7 @@ void migrate_enable(void) +@@ -7249,6 +7326,7 @@ void migrate_enable(void) arg.dest_cpu = dest_cpu; unpin_current_cpu(); @@ -396,7 +396,7 @@ Signed-off-by: Thomas Gleixner preempt_enable(); stop_one_cpu(task_cpu(p), migration_cpu_stop, &arg); tlb_migrate_finish(p->mm); -@@ -7251,6 +7329,7 @@ void migrate_enable(void) +@@ -7257,6 +7335,7 @@ void migrate_enable(void) } } unpin_current_cpu(); @@ -451,7 +451,7 @@ Signed-off-by: Thomas Gleixner return; } hrtick_start(rq, delta); -@@ -6578,7 +6578,7 @@ static void check_preempt_wakeup(struct +@@ -6612,7 +6612,7 @@ static void check_preempt_wakeup(struct return; preempt: @@ -460,7 +460,7 @@ Signed-off-by: Thomas Gleixner /* * Only set the backward buddy when the current task is still * on the rq. This can happen when a wakeup gets interleaved -@@ -9689,7 +9689,7 @@ static void task_fork_fair(struct task_s +@@ -9723,7 +9723,7 @@ static void task_fork_fair(struct task_s * 'current' within the tree based on its new key value. */ swap(curr->vruntime, se->vruntime); @@ -469,7 +469,7 @@ Signed-off-by: Thomas Gleixner } se->vruntime -= cfs_rq->min_vruntime; -@@ -9713,7 +9713,7 @@ prio_changed_fair(struct rq *rq, struct +@@ -9747,7 +9747,7 @@ prio_changed_fair(struct rq *rq, struct */ if (rq->curr == p) { if (p->prio > oldprio) @@ -492,7 +492,7 @@ Signed-off-by: Thomas Gleixner /* --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h -@@ -1641,6 +1641,15 @@ extern void reweight_task(struct task_st +@@ -1639,6 +1639,15 @@ extern void reweight_task(struct task_st extern void resched_curr(struct rq *rq); extern void resched_cpu(int cpu); diff --git a/debian/patches-rt/preempt-nort-rt-variants.patch b/debian/patches-rt/preempt-nort-rt-variants.patch index 37df28e69..59575a069 100644 --- a/debian/patches-rt/preempt-nort-rt-variants.patch +++ b/debian/patches-rt/preempt-nort-rt-variants.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 24 Jul 2009 12:38:56 +0200 Subject: preempt: Provide preempt_*_(no)rt variants -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz RT needs a few preempt_disable/enable points which are not necessary otherwise. Implement variants to avoid #ifdeffery. diff --git a/debian/patches-rt/printk-27force_early_printk-27-boot-param-to-help-with-debugging.patch b/debian/patches-rt/printk-27force_early_printk-27-boot-param-to-help-with-debugging.patch index 52f8fa8d9..9336b4074 100644 --- a/debian/patches-rt/printk-27force_early_printk-27-boot-param-to-help-with-debugging.patch +++ b/debian/patches-rt/printk-27force_early_printk-27-boot-param-to-help-with-debugging.patch @@ -1,7 +1,7 @@ Subject: printk: Add "force_early_printk" boot param to help with debugging From: Peter Zijlstra Date: Fri, 02 Sep 2011 14:41:29 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Gives me an option to screw printk and actually see what the machine says. diff --git a/debian/patches-rt/printk-kill.patch b/debian/patches-rt/printk-kill.patch index e6a188266..85bb506ab 100644 --- a/debian/patches-rt/printk-kill.patch +++ b/debian/patches-rt/printk-kill.patch @@ -1,7 +1,7 @@ Subject: printk: Add a printk kill switch From: Ingo Molnar Date: Fri, 22 Jul 2011 17:58:40 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Add a prinkt-kill-switch. This is used from (NMI) watchdog to ensure that it does not dead-lock with the early printk code. @@ -88,7 +88,7 @@ Signed-off-by: Thomas Gleixner #ifdef CONFIG_PRINTK DECLARE_WAIT_QUEUE_HEAD(log_wait); /* the next printk record to read by syslog(READ) or /proc/kmsg */ -@@ -1892,6 +1944,13 @@ asmlinkage int vprintk_emit(int facility +@@ -1897,6 +1949,13 @@ asmlinkage int vprintk_emit(int facility bool in_sched = false; unsigned long flags; @@ -102,7 +102,7 @@ Signed-off-by: Thomas Gleixner if (level == LOGLEVEL_SCHED) { level = LOGLEVEL_DEFAULT; in_sched = true; -@@ -2032,26 +2091,6 @@ static bool suppress_message_printing(in +@@ -2037,26 +2096,6 @@ static bool suppress_message_printing(in #endif /* CONFIG_PRINTK */ diff --git a/debian/patches-rt/printk-rt-aware.patch b/debian/patches-rt/printk-rt-aware.patch index d724470ee..45a540ab2 100644 --- a/debian/patches-rt/printk-rt-aware.patch +++ b/debian/patches-rt/printk-rt-aware.patch @@ -1,7 +1,7 @@ Subject: printk: Make rt aware From: Thomas Gleixner Date: Wed, 19 Sep 2012 14:50:37 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Drop the lock before calling the console driver and do not disable interrupts while printing to a serial console. @@ -13,7 +13,7 @@ Signed-off-by: Thomas Gleixner --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c -@@ -1612,6 +1612,7 @@ SYSCALL_DEFINE3(syslog, int, type, char +@@ -1617,6 +1617,7 @@ SYSCALL_DEFINE3(syslog, int, type, char return do_syslog(type, buf, len, SYSLOG_FROM_READER); } @@ -21,7 +21,7 @@ Signed-off-by: Thomas Gleixner /* * Special console_lock variants that help to reduce the risk of soft-lockups. * They allow to pass console_lock to another printk() call using a busy wait. -@@ -1752,6 +1753,15 @@ static int console_trylock_spinning(void +@@ -1757,6 +1758,15 @@ static int console_trylock_spinning(void return 1; } @@ -37,7 +37,7 @@ Signed-off-by: Thomas Gleixner /* * Call the console drivers, asking them to write out * log_buf[start] to log_buf[end - 1]. -@@ -1767,6 +1777,7 @@ static void call_console_drivers(const c +@@ -1772,6 +1782,7 @@ static void call_console_drivers(const c if (!console_drivers) return; @@ -45,7 +45,7 @@ Signed-off-by: Thomas Gleixner for_each_console(con) { if (exclusive_console && con != exclusive_console) continue; -@@ -1782,6 +1793,7 @@ static void call_console_drivers(const c +@@ -1787,6 +1798,7 @@ static void call_console_drivers(const c else con->write(con, text, len); } @@ -53,7 +53,7 @@ Signed-off-by: Thomas Gleixner } int printk_delay_msec __read_mostly; -@@ -1973,20 +1985,30 @@ asmlinkage int vprintk_emit(int facility +@@ -1978,20 +1990,30 @@ asmlinkage int vprintk_emit(int facility /* If called from the scheduler, we can not call up(). */ if (!in_sched) { @@ -87,7 +87,7 @@ Signed-off-by: Thomas Gleixner } wake_up_klogd(); -@@ -2439,6 +2461,10 @@ void console_unlock(void) +@@ -2444,6 +2466,10 @@ void console_unlock(void) console_seq++; raw_spin_unlock(&logbuf_lock); @@ -98,7 +98,7 @@ Signed-off-by: Thomas Gleixner /* * While actively printing out messages, if another printk() * were to occur on another CPU, it may wait for this one to -@@ -2457,6 +2483,7 @@ void console_unlock(void) +@@ -2462,6 +2488,7 @@ void console_unlock(void) } printk_safe_exit_irqrestore(flags); diff --git a/debian/patches-rt/ptrace-fix-ptrace-vs-tasklist_lock-race.patch b/debian/patches-rt/ptrace-fix-ptrace-vs-tasklist_lock-race.patch index 07816203e..e008fcdef 100644 --- a/debian/patches-rt/ptrace-fix-ptrace-vs-tasklist_lock-race.patch +++ b/debian/patches-rt/ptrace-fix-ptrace-vs-tasklist_lock-race.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 29 Aug 2013 18:21:04 +0200 Subject: ptrace: fix ptrace vs tasklist_lock race -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz As explained by Alexander Fyodorov : @@ -44,7 +44,7 @@ Signed-off-by: Sebastian Andrzej Siewior #define task_contributes_to_load(task) ((task->state & TASK_UNINTERRUPTIBLE) != 0 && \ (task->flags & PF_FROZEN) == 0 && \ (task->state & TASK_NOLOAD) == 0) -@@ -1699,6 +1695,51 @@ static inline int test_tsk_need_resched( +@@ -1709,6 +1705,51 @@ static inline int test_tsk_need_resched( return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED)); } diff --git a/debian/patches-rt/radix-tree-use-local-locks.patch b/debian/patches-rt/radix-tree-use-local-locks.patch index 35edc9b6f..44f08b4a4 100644 --- a/debian/patches-rt/radix-tree-use-local-locks.patch +++ b/debian/patches-rt/radix-tree-use-local-locks.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 25 Jan 2017 16:34:27 +0100 Subject: [PATCH] radix-tree: use local locks -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The preload functionality uses per-CPU variables and preempt-disable to ensure that it does not switch CPUs during its usage. This patch adds diff --git a/debian/patches-rt/random-avoid-preempt_disable-ed-section.patch b/debian/patches-rt/random-avoid-preempt_disable-ed-section.patch index d8f151ad8..4c492b717 100644 --- a/debian/patches-rt/random-avoid-preempt_disable-ed-section.patch +++ b/debian/patches-rt/random-avoid-preempt_disable-ed-section.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 12 May 2017 15:46:17 +0200 Subject: [PATCH] random: avoid preempt_disable()ed section -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz extract_crng() will use sleeping locks while in a preempt_disable() section due to get_cpu_var(). diff --git a/debian/patches-rt/random-make-it-work-on-rt.patch b/debian/patches-rt/random-make-it-work-on-rt.patch index 39aaf894e..25bfeb9e7 100644 --- a/debian/patches-rt/random-make-it-work-on-rt.patch +++ b/debian/patches-rt/random-make-it-work-on-rt.patch @@ -1,7 +1,7 @@ Subject: random: Make it work on rt From: Thomas Gleixner Date: Tue, 21 Aug 2012 20:38:50 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Delegate the random insertion to the forced threaded interrupt handler. Store the return IP of the hard interrupt handler in the irq @@ -135,7 +135,7 @@ Signed-off-by: Thomas Gleixner note_interrupt(desc, retval); --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c -@@ -1072,6 +1072,12 @@ static int irq_thread(void *data) +@@ -1076,6 +1076,12 @@ static int irq_thread(void *data) if (action_ret == IRQ_WAKE_THREAD) irq_wake_secondary(desc, action); diff --git a/debian/patches-rt/rcu-Eliminate-softirq-processing-from-rcutree.patch b/debian/patches-rt/rcu-Eliminate-softirq-processing-from-rcutree.patch index 854fa4f19..18dd7ce90 100644 --- a/debian/patches-rt/rcu-Eliminate-softirq-processing-from-rcutree.patch +++ b/debian/patches-rt/rcu-Eliminate-softirq-processing-from-rcutree.patch @@ -1,7 +1,7 @@ From: "Paul E. McKenney" Date: Mon, 4 Nov 2013 13:21:10 -0800 Subject: rcu: Eliminate softirq processing from rcutree -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Running RCU out of softirq is a problem for some workloads that would like to manage RCU core processing independently of other softirq work, @@ -38,7 +38,7 @@ Signed-off-by: Sebastian Andrzej Siewior #include "tree.h" #include "rcu.h" -@@ -2879,18 +2886,17 @@ static void +@@ -2888,18 +2895,17 @@ static void /* * Do RCU core processing for the current CPU. */ @@ -59,7 +59,7 @@ Signed-off-by: Sebastian Andrzej Siewior /* * Schedule RCU callback invocation. If the specified type of RCU * does not support RCU priority boosting, just do a direct call, -@@ -2902,18 +2908,105 @@ static void invoke_rcu_callbacks(struct +@@ -2911,18 +2917,105 @@ static void invoke_rcu_callbacks(struct { if (unlikely(!READ_ONCE(rcu_scheduler_fully_active))) return; @@ -171,7 +171,7 @@ Signed-off-by: Sebastian Andrzej Siewior /* * Handle any core-RCU processing required by a call_rcu() invocation. -@@ -4179,7 +4272,6 @@ void __init rcu_init(void) +@@ -4188,7 +4281,6 @@ void __init rcu_init(void) if (dump_tree) rcu_dump_rcu_node_tree(&rcu_sched_state); __rcu_init_preempt(); diff --git a/debian/patches-rt/rcu-disable-rcu-fast-no-hz-on-rt.patch b/debian/patches-rt/rcu-disable-rcu-fast-no-hz-on-rt.patch index 0555afd5e..3f25087c7 100644 --- a/debian/patches-rt/rcu-disable-rcu-fast-no-hz-on-rt.patch +++ b/debian/patches-rt/rcu-disable-rcu-fast-no-hz-on-rt.patch @@ -1,7 +1,7 @@ Subject: rcu: Disable RCU_FAST_NO_HZ on RT From: Thomas Gleixner Date: Sun, 28 Oct 2012 13:26:09 +0000 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz This uses a timer_list timer from the irq disabled guts of the idle code. Disable it for now to prevent wreckage. diff --git a/debian/patches-rt/rcu-enable-rcu_normal_after_boot-by-default-for-RT.patch b/debian/patches-rt/rcu-enable-rcu_normal_after_boot-by-default-for-RT.patch index 706fb9cff..605a14658 100644 --- a/debian/patches-rt/rcu-enable-rcu_normal_after_boot-by-default-for-RT.patch +++ b/debian/patches-rt/rcu-enable-rcu_normal_after_boot-by-default-for-RT.patch @@ -1,7 +1,7 @@ From: Julia Cartwright Date: Wed, 12 Oct 2016 11:21:14 -0500 Subject: [PATCH] rcu: enable rcu_normal_after_boot by default for RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The forcing of an expedited grace period is an expensive and very RT-application unfriendly operation, as it forcibly preempts all running diff --git a/debian/patches-rt/rcu-make-RCU_BOOST-default-on-RT.patch b/debian/patches-rt/rcu-make-RCU_BOOST-default-on-RT.patch index c05e2cf02..b46c7e4e6 100644 --- a/debian/patches-rt/rcu-make-RCU_BOOST-default-on-RT.patch +++ b/debian/patches-rt/rcu-make-RCU_BOOST-default-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 21 Mar 2014 20:19:05 +0100 Subject: rcu: make RCU_BOOST default on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Since it is no longer invoked from the softirq people run into OOM more often if the priority of the RCU thread is too low. Making boosting diff --git a/debian/patches-rt/rcu-merge-rcu-bh-into-rcu-preempt-for-rt.patch b/debian/patches-rt/rcu-merge-rcu-bh-into-rcu-preempt-for-rt.patch index 659c7d6cf..26f69f2db 100644 --- a/debian/patches-rt/rcu-merge-rcu-bh-into-rcu-preempt-for-rt.patch +++ b/debian/patches-rt/rcu-merge-rcu-bh-into-rcu-preempt-for-rt.patch @@ -1,7 +1,7 @@ Subject: rcu: Merge RCU-bh into RCU-preempt Date: Wed, 5 Oct 2011 11:59:38 -0700 From: Thomas Gleixner -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The Linux kernel has long RCU-bh read-side critical sections that intolerably increase scheduling latency under mainline's RCU-bh rules, @@ -244,7 +244,7 @@ Signed-off-by: Thomas Gleixner case RCU_SCHED_FLAVOR: rsp = &rcu_sched_state; break; -@@ -3040,6 +3058,7 @@ void call_rcu_sched(struct rcu_head *hea +@@ -3049,6 +3067,7 @@ void call_rcu_sched(struct rcu_head *hea } EXPORT_SYMBOL_GPL(call_rcu_sched); @@ -252,7 +252,7 @@ Signed-off-by: Thomas Gleixner /** * call_rcu_bh() - Queue an RCU for invocation after a quicker grace period. * @head: structure to be used for queueing the RCU updates. -@@ -3067,6 +3086,7 @@ void call_rcu_bh(struct rcu_head *head, +@@ -3076,6 +3095,7 @@ void call_rcu_bh(struct rcu_head *head, __call_rcu(head, func, &rcu_bh_state, -1, 0); } EXPORT_SYMBOL_GPL(call_rcu_bh); @@ -260,7 +260,7 @@ Signed-off-by: Thomas Gleixner /* * Queue an RCU callback for lazy invocation after a grace period. -@@ -3152,6 +3172,7 @@ void synchronize_sched(void) +@@ -3161,6 +3181,7 @@ void synchronize_sched(void) } EXPORT_SYMBOL_GPL(synchronize_sched); @@ -268,7 +268,7 @@ Signed-off-by: Thomas Gleixner /** * synchronize_rcu_bh - wait until an rcu_bh grace period has elapsed. * -@@ -3178,6 +3199,7 @@ void synchronize_rcu_bh(void) +@@ -3187,6 +3208,7 @@ void synchronize_rcu_bh(void) wait_rcu_gp(call_rcu_bh); } EXPORT_SYMBOL_GPL(synchronize_rcu_bh); @@ -276,7 +276,7 @@ Signed-off-by: Thomas Gleixner /** * get_state_synchronize_rcu - Snapshot current RCU state -@@ -3485,6 +3507,7 @@ static void _rcu_barrier(struct rcu_stat +@@ -3494,6 +3516,7 @@ static void _rcu_barrier(struct rcu_stat mutex_unlock(&rsp->barrier_mutex); } @@ -284,7 +284,7 @@ Signed-off-by: Thomas Gleixner /** * rcu_barrier_bh - Wait until all in-flight call_rcu_bh() callbacks complete. */ -@@ -3493,6 +3516,7 @@ void rcu_barrier_bh(void) +@@ -3502,6 +3525,7 @@ void rcu_barrier_bh(void) _rcu_barrier(&rcu_bh_state); } EXPORT_SYMBOL_GPL(rcu_barrier_bh); @@ -292,7 +292,7 @@ Signed-off-by: Thomas Gleixner /** * rcu_barrier_sched - Wait for in-flight call_rcu_sched() callbacks. -@@ -4140,7 +4164,9 @@ void __init rcu_init(void) +@@ -4149,7 +4173,9 @@ void __init rcu_init(void) rcu_bootup_announce(); rcu_init_geometry(); diff --git a/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch b/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch index 66ef40651..5c3c7524a 100644 --- a/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch +++ b/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch @@ -1,7 +1,7 @@ Subject: ARM: Initialize split page table locks for vector page From: Frank Rowand Date: Sat, 1 Oct 2011 18:58:13 -0700 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Without this patch, ARM can not use SPLIT_PTLOCK_CPUS if PREEMPT_RT_FULL=y because vectors_user_mapping() creates a diff --git a/debian/patches-rt/rt-Increase-decrease-the-nr-of-migratory-tasks-when-.patch b/debian/patches-rt/rt-Increase-decrease-the-nr-of-migratory-tasks-when-.patch index a6bde6940..1d4191f12 100644 --- a/debian/patches-rt/rt-Increase-decrease-the-nr-of-migratory-tasks-when-.patch +++ b/debian/patches-rt/rt-Increase-decrease-the-nr-of-migratory-tasks-when-.patch @@ -1,7 +1,7 @@ From: Daniel Bristot de Oliveira Date: Mon, 26 Jun 2017 17:07:15 +0200 Subject: rt: Increase/decrease the nr of migratory tasks when enabling/disabling migration -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz There is a problem in the migrate_disable()/enable() implementation regarding the number of migratory tasks in the rt/dl RQs. The problem @@ -81,7 +81,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/kernel/sched/core.c +++ b/kernel/sched/core.c -@@ -7133,6 +7133,47 @@ const u32 sched_prio_to_wmult[40] = { +@@ -7139,6 +7139,47 @@ const u32 sched_prio_to_wmult[40] = { #if defined(CONFIG_PREEMPT_COUNT) && defined(CONFIG_SMP) @@ -129,7 +129,7 @@ Signed-off-by: Sebastian Andrzej Siewior void migrate_disable(void) { struct task_struct *p = current; -@@ -7156,10 +7197,9 @@ void migrate_disable(void) +@@ -7162,10 +7203,9 @@ void migrate_disable(void) } preempt_disable(); @@ -142,7 +142,7 @@ Signed-off-by: Sebastian Andrzej Siewior preempt_enable(); } -@@ -7191,9 +7231,8 @@ void migrate_enable(void) +@@ -7197,9 +7237,8 @@ void migrate_enable(void) preempt_disable(); diff --git a/debian/patches-rt/rt-introduce-cpu-chill.patch b/debian/patches-rt/rt-introduce-cpu-chill.patch index d8eaaacb7..3aff5c61c 100644 --- a/debian/patches-rt/rt-introduce-cpu-chill.patch +++ b/debian/patches-rt/rt-introduce-cpu-chill.patch @@ -1,7 +1,7 @@ Subject: rt: Introduce cpu_chill() From: Thomas Gleixner Date: Wed, 07 Mar 2012 20:51:03 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Retry loops on RT might loop forever when the modifying side was preempted. Add cpu_chill() to replace cpu_relax(). cpu_chill() diff --git a/debian/patches-rt/rt-local-irq-lock.patch b/debian/patches-rt/rt-local-irq-lock.patch index 1081129f0..782a2ac00 100644 --- a/debian/patches-rt/rt-local-irq-lock.patch +++ b/debian/patches-rt/rt-local-irq-lock.patch @@ -1,7 +1,7 @@ Subject: rt: Add local irq locks From: Thomas Gleixner Date: Mon, 20 Jun 2011 09:03:47 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Introduce locallock. For !RT this maps to preempt_disable()/ local_irq_disable() so there is not much that changes. For RT this will diff --git a/debian/patches-rt/rt-preempt-base-config.patch b/debian/patches-rt/rt-preempt-base-config.patch index 5e8554edc..bfedf6d3e 100644 --- a/debian/patches-rt/rt-preempt-base-config.patch +++ b/debian/patches-rt/rt-preempt-base-config.patch @@ -1,7 +1,7 @@ Subject: rt: Provide PREEMPT_RT_BASE config switch From: Thomas Gleixner Date: Fri, 17 Jun 2011 12:39:57 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Introduce PREEMPT_RT_BASE which enables parts of PREEMPT_RT_FULL. Forces interrupt threading and enables some of the RT diff --git a/debian/patches-rt/rt-serial-warn-fix.patch b/debian/patches-rt/rt-serial-warn-fix.patch index 54fe41866..e6d6bbd5a 100644 --- a/debian/patches-rt/rt-serial-warn-fix.patch +++ b/debian/patches-rt/rt-serial-warn-fix.patch @@ -1,7 +1,7 @@ Subject: rt: Improve the serial console PASS_LIMIT From: Ingo Molnar Date: Wed Dec 14 13:05:54 CET 2011 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Beyond the warning: diff --git a/debian/patches-rt/rtmutex-Make-lock_killable-work.patch b/debian/patches-rt/rtmutex-Make-lock_killable-work.patch index 03663e313..cc8698131 100644 --- a/debian/patches-rt/rtmutex-Make-lock_killable-work.patch +++ b/debian/patches-rt/rtmutex-Make-lock_killable-work.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Sat, 1 Apr 2017 12:50:59 +0200 Subject: [PATCH] rtmutex: Make lock_killable work -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Locking an rt mutex killable does not work because signal handling is restricted to TASK_INTERRUPTIBLE. diff --git a/debian/patches-rt/rtmutex-Provide-rt_mutex_slowlock_locked.patch b/debian/patches-rt/rtmutex-Provide-rt_mutex_slowlock_locked.patch index 2212bcbb4..2667a4e3f 100644 --- a/debian/patches-rt/rtmutex-Provide-rt_mutex_slowlock_locked.patch +++ b/debian/patches-rt/rtmutex-Provide-rt_mutex_slowlock_locked.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 16:14:22 +0200 Subject: rtmutex: Provide rt_mutex_slowlock_locked() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz This is the inner-part of rt_mutex_slowlock(), required for rwsem-rt. diff --git a/debian/patches-rt/rtmutex-add-mutex-implementation-based-on-rtmutex.patch b/debian/patches-rt/rtmutex-add-mutex-implementation-based-on-rtmutex.patch index 47dfee956..de0f0b186 100644 --- a/debian/patches-rt/rtmutex-add-mutex-implementation-based-on-rtmutex.patch +++ b/debian/patches-rt/rtmutex-add-mutex-implementation-based-on-rtmutex.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 17:17:03 +0200 Subject: rtmutex: add mutex implementation based on rtmutex -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Signed-off-by: Thomas Gleixner Signed-off-by: Sebastian Andrzej Siewior diff --git a/debian/patches-rt/rtmutex-add-rwlock-implementation-based-on-rtmutex.patch b/debian/patches-rt/rtmutex-add-rwlock-implementation-based-on-rtmutex.patch index 40da797b3..6d3798a41 100644 --- a/debian/patches-rt/rtmutex-add-rwlock-implementation-based-on-rtmutex.patch +++ b/debian/patches-rt/rtmutex-add-rwlock-implementation-based-on-rtmutex.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 17:18:06 +0200 Subject: rtmutex: add rwlock implementation based on rtmutex -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The implementation is bias-based, similar to the rwsem implementation. diff --git a/debian/patches-rt/rtmutex-add-rwsem-implementation-based-on-rtmutex.patch b/debian/patches-rt/rtmutex-add-rwsem-implementation-based-on-rtmutex.patch index 6f983f386..718d812d8 100644 --- a/debian/patches-rt/rtmutex-add-rwsem-implementation-based-on-rtmutex.patch +++ b/debian/patches-rt/rtmutex-add-rwsem-implementation-based-on-rtmutex.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 17:28:34 +0200 Subject: rtmutex: add rwsem implementation based on rtmutex -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The RT specific R/W semaphore implementation restricts the number of readers to one because a writer cannot block on multiple readers and inherit its diff --git a/debian/patches-rt/rtmutex-add-sleeping-lock-implementation.patch b/debian/patches-rt/rtmutex-add-sleeping-lock-implementation.patch index a9f2b2879..26224e377 100644 --- a/debian/patches-rt/rtmutex-add-sleeping-lock-implementation.patch +++ b/debian/patches-rt/rtmutex-add-sleeping-lock-implementation.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 17:11:19 +0200 Subject: rtmutex: add sleeping lock implementation -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Signed-off-by: Thomas Gleixner Signed-off-by: Sebastian Andrzej Siewior diff --git a/debian/patches-rt/rtmutex-add-ww_mutex-addon-for-mutex-rt.patch b/debian/patches-rt/rtmutex-add-ww_mutex-addon-for-mutex-rt.patch index 9c21ed539..ef46a365d 100644 --- a/debian/patches-rt/rtmutex-add-ww_mutex-addon-for-mutex-rt.patch +++ b/debian/patches-rt/rtmutex-add-ww_mutex-addon-for-mutex-rt.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 12 Oct 2017 17:34:38 +0200 Subject: rtmutex: add ww_mutex addon for mutex-rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Signed-off-by: Sebastian Andrzej Siewior --- diff --git a/debian/patches-rt/rtmutex-annotate-sleeping-lock-context.patch b/debian/patches-rt/rtmutex-annotate-sleeping-lock-context.patch index 5fdf83b09..d4c917601 100644 --- a/debian/patches-rt/rtmutex-annotate-sleeping-lock-context.patch +++ b/debian/patches-rt/rtmutex-annotate-sleeping-lock-context.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 21 Sep 2017 14:25:13 +0200 Subject: [PATCH] rtmutex: annotate sleeping lock context -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The RCU code complains on schedule() within a rcu_readlock() section. The valid scenario on -RT is if a sleeping is held. In order to suppress @@ -68,7 +68,7 @@ Signed-off-by: Sebastian Andrzej Siewior #endif #ifdef CONFIG_PREEMPT_RCU -@@ -1792,6 +1801,23 @@ static __always_inline bool need_resched +@@ -1802,6 +1811,23 @@ static __always_inline bool need_resched return unlikely(tif_need_resched()); } @@ -240,7 +240,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/kernel/sched/core.c +++ b/kernel/sched/core.c -@@ -7302,4 +7302,49 @@ void migrate_enable(void) +@@ -7308,4 +7308,49 @@ void migrate_enable(void) preempt_enable(); } EXPORT_SYMBOL(migrate_enable); diff --git a/debian/patches-rt/rtmutex-avoid-include-hell.patch b/debian/patches-rt/rtmutex-avoid-include-hell.patch index abf6c29c5..d026baacc 100644 --- a/debian/patches-rt/rtmutex-avoid-include-hell.patch +++ b/debian/patches-rt/rtmutex-avoid-include-hell.patch @@ -1,7 +1,7 @@ Subject: rtmutex: Avoid include hell From: Thomas Gleixner Date: Wed, 29 Jun 2011 20:06:39 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Include only the required raw types. This avoids pulling in the complete spinlock header which in turn requires rtmutex.h at some point. diff --git a/debian/patches-rt/rtmutex-export-lockdep-less-version-of-rt_mutex-s-lo.patch b/debian/patches-rt/rtmutex-export-lockdep-less-version-of-rt_mutex-s-lo.patch index c1426f988..f3c71173e 100644 --- a/debian/patches-rt/rtmutex-export-lockdep-less-version-of-rt_mutex-s-lo.patch +++ b/debian/patches-rt/rtmutex-export-lockdep-less-version-of-rt_mutex-s-lo.patch @@ -2,7 +2,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 16:36:39 +0200 Subject: rtmutex: export lockdep-less version of rt_mutex's lock, trylock and unlock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Required for lock implementation ontop of rtmutex. diff --git a/debian/patches-rt/rtmutex-futex-prepare-rt.patch b/debian/patches-rt/rtmutex-futex-prepare-rt.patch index 46a0a4401..eb5332bd6 100644 --- a/debian/patches-rt/rtmutex-futex-prepare-rt.patch +++ b/debian/patches-rt/rtmutex-futex-prepare-rt.patch @@ -1,7 +1,7 @@ Subject: rtmutex: Handle the various new futex race conditions From: Thomas Gleixner Date: Fri, 10 Jun 2011 11:04:15 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz RT opens a few new interesting race conditions in the rtmutex/futex combo due to futex hash bucket lock being a 'sleeping' spinlock and diff --git a/debian/patches-rt/rtmutex-lock-killable.patch b/debian/patches-rt/rtmutex-lock-killable.patch index 3b8bf531f..3e88156e3 100644 --- a/debian/patches-rt/rtmutex-lock-killable.patch +++ b/debian/patches-rt/rtmutex-lock-killable.patch @@ -1,7 +1,7 @@ Subject: rtmutex: Add rtmutex_lock_killable() From: Thomas Gleixner Date: Thu, 09 Jun 2011 11:43:52 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Add "killable" type to rtmutex. We need this since rtmutex are used as "normal" mutexes which do use this type. diff --git a/debian/patches-rt/rtmutex-trylock-is-okay-on-RT.patch b/debian/patches-rt/rtmutex-trylock-is-okay-on-RT.patch index 72b0c832f..a48685241 100644 --- a/debian/patches-rt/rtmutex-trylock-is-okay-on-RT.patch +++ b/debian/patches-rt/rtmutex-trylock-is-okay-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed 02 Dec 2015 11:34:07 +0100 Subject: rtmutex: trylock is okay on -RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz non-RT kernel could deadlock on rt_mutex_trylock() in softirq context. On -RT we don't run softirqs in IRQ context but in thread context so it is diff --git a/debian/patches-rt/rtmutex-wire-up-RT-s-locking.patch b/debian/patches-rt/rtmutex-wire-up-RT-s-locking.patch index 5ee91c899..322c35e47 100644 --- a/debian/patches-rt/rtmutex-wire-up-RT-s-locking.patch +++ b/debian/patches-rt/rtmutex-wire-up-RT-s-locking.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 17:31:14 +0200 Subject: rtmutex: wire up RT's locking -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Signed-off-by: Thomas Gleixner Signed-off-by: Sebastian Andrzej Siewior diff --git a/debian/patches-rt/rtmutex_dont_include_rcu.patch b/debian/patches-rt/rtmutex_dont_include_rcu.patch index 875413356..d91d57e95 100644 --- a/debian/patches-rt/rtmutex_dont_include_rcu.patch +++ b/debian/patches-rt/rtmutex_dont_include_rcu.patch @@ -1,6 +1,6 @@ From: Sebastian Andrzej Siewior Subject: rbtree: don't include the rcu header -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The RCU header pulls in spinlock.h and fails due not yet defined types: diff --git a/debian/patches-rt/sched-Allow-pinned-user-tasks-to-be-awakened-to-the-.patch b/debian/patches-rt/sched-Allow-pinned-user-tasks-to-be-awakened-to-the-.patch index 0b602385a..86a1e2d36 100644 --- a/debian/patches-rt/sched-Allow-pinned-user-tasks-to-be-awakened-to-the-.patch +++ b/debian/patches-rt/sched-Allow-pinned-user-tasks-to-be-awakened-to-the-.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Sun, 19 Aug 2018 08:28:35 +0200 Subject: [PATCH] sched: Allow pinned user tasks to be awakened to the CPU they pinned -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Since commit 7af443ee16976 ("sched/core: Require cpu_active() in select_task_rq(), for user tasks") select_fallback_rq() will BUG() if diff --git a/debian/patches-rt/sched-delay-put-task.patch b/debian/patches-rt/sched-delay-put-task.patch index 98961a868..f143090ad 100644 --- a/debian/patches-rt/sched-delay-put-task.patch +++ b/debian/patches-rt/sched-delay-put-task.patch @@ -1,7 +1,7 @@ Subject: sched: Move task_struct cleanup to RCU From: Thomas Gleixner Date: Tue, 31 May 2011 16:59:16 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz __put_task_struct() does quite some expensive work. We don't want to burden random tasks with that. @@ -15,7 +15,7 @@ Signed-off-by: Thomas Gleixner --- a/include/linux/sched.h +++ b/include/linux/sched.h -@@ -1185,6 +1185,9 @@ struct task_struct { +@@ -1186,6 +1186,9 @@ struct task_struct { unsigned int sequential_io; unsigned int sequential_io_avg; #endif diff --git a/debian/patches-rt/sched-disable-rt-group-sched-on-rt.patch b/debian/patches-rt/sched-disable-rt-group-sched-on-rt.patch index cf5e87d12..63a442b90 100644 --- a/debian/patches-rt/sched-disable-rt-group-sched-on-rt.patch +++ b/debian/patches-rt/sched-disable-rt-group-sched-on-rt.patch @@ -1,7 +1,7 @@ Subject: sched: Disable CONFIG_RT_GROUP_SCHED on RT From: Thomas Gleixner Date: Mon, 18 Jul 2011 17:03:52 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Carsten reported problems when running: diff --git a/debian/patches-rt/sched-disable-ttwu-queue.patch b/debian/patches-rt/sched-disable-ttwu-queue.patch index 3771d2949..826a1947f 100644 --- a/debian/patches-rt/sched-disable-ttwu-queue.patch +++ b/debian/patches-rt/sched-disable-ttwu-queue.patch @@ -1,7 +1,7 @@ Subject: sched: Disable TTWU_QUEUE on RT From: Thomas Gleixner Date: Tue, 13 Sep 2011 16:42:35 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The queued remote wakeup mechanism can introduce rather large latencies if the number of migrated tasks is high. Disable it for RT. diff --git a/debian/patches-rt/sched-limit-nr-migrate.patch b/debian/patches-rt/sched-limit-nr-migrate.patch index e15b36d53..b4db2cb2a 100644 --- a/debian/patches-rt/sched-limit-nr-migrate.patch +++ b/debian/patches-rt/sched-limit-nr-migrate.patch @@ -1,7 +1,7 @@ Subject: sched: Limit the number of task migrations per batch From: Thomas Gleixner Date: Mon, 06 Jun 2011 12:12:51 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Put an upper limit on the number of tasks which are migrated per batch to avoid large latencies. diff --git a/debian/patches-rt/sched-might-sleep-do-not-account-rcu-depth.patch b/debian/patches-rt/sched-might-sleep-do-not-account-rcu-depth.patch index 4c5e49fb0..99b9e5900 100644 --- a/debian/patches-rt/sched-might-sleep-do-not-account-rcu-depth.patch +++ b/debian/patches-rt/sched-might-sleep-do-not-account-rcu-depth.patch @@ -1,7 +1,7 @@ Subject: sched: Do not account rcu_preempt_depth on RT in might_sleep() From: Thomas Gleixner Date: Tue, 07 Jun 2011 09:19:06 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz RT changes the rcu_preempt_depth semantics, so we cannot check for it in might_sleep(). @@ -37,7 +37,7 @@ Signed-off-by: Thomas Gleixner /* Internal to kernel */ --- a/kernel/sched/core.c +++ b/kernel/sched/core.c -@@ -6149,7 +6149,7 @@ void __init sched_init(void) +@@ -6155,7 +6155,7 @@ void __init sched_init(void) #ifdef CONFIG_DEBUG_ATOMIC_SLEEP static inline int preempt_count_equals(int preempt_offset) { diff --git a/debian/patches-rt/sched-migrate_disable-Add-export_symbol_gpl-for-__mi.patch b/debian/patches-rt/sched-migrate_disable-Add-export_symbol_gpl-for-__mi.patch index dc65c43cb..9d30d6c56 100644 --- a/debian/patches-rt/sched-migrate_disable-Add-export_symbol_gpl-for-__mi.patch +++ b/debian/patches-rt/sched-migrate_disable-Add-export_symbol_gpl-for-__mi.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 9 Oct 2018 17:34:50 +0200 Subject: [PATCH] sched/migrate_disable: Add export_symbol_gpl for __migrate_disabled -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Jonathan reported that lttng/modules can't use __migrate_disabled(). This function is only used by sched/core itself and the tracing diff --git a/debian/patches-rt/sched-migrate_disable-fallback-to-preempt_disable-in.patch b/debian/patches-rt/sched-migrate_disable-fallback-to-preempt_disable-in.patch index f4e4edc0c..cdd5c69f8 100644 --- a/debian/patches-rt/sched-migrate_disable-fallback-to-preempt_disable-in.patch +++ b/debian/patches-rt/sched-migrate_disable-fallback-to-preempt_disable-in.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 5 Jul 2018 14:44:51 +0200 Subject: [PATCH] sched/migrate_disable: fallback to preempt_disable() instead barrier() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz On SMP + !RT migrate_disable() is still around. It is not part of spin_lock() anymore so it has almost no users. However the futex code has a workaround for @@ -117,7 +117,7 @@ Signed-off-by: Sebastian Andrzej Siewior if (__migrate_disabled(p)) { p->migrate_disable_update = 1; goto out; -@@ -7158,7 +7158,7 @@ const u32 sched_prio_to_wmult[40] = { +@@ -7164,7 +7164,7 @@ const u32 sched_prio_to_wmult[40] = { #undef CREATE_TRACE_POINTS @@ -126,7 +126,7 @@ Signed-off-by: Sebastian Andrzej Siewior static inline void update_nr_migratory(struct task_struct *p, long delta) -@@ -7306,45 +7306,44 @@ EXPORT_SYMBOL(migrate_enable); +@@ -7312,45 +7312,44 @@ EXPORT_SYMBOL(migrate_enable); #elif !defined(CONFIG_SMP) && defined(CONFIG_PREEMPT_RT_BASE) void migrate_disable(void) { diff --git a/debian/patches-rt/sched-mmdrop-delayed.patch b/debian/patches-rt/sched-mmdrop-delayed.patch index 793a48bc4..4331f59f1 100644 --- a/debian/patches-rt/sched-mmdrop-delayed.patch +++ b/debian/patches-rt/sched-mmdrop-delayed.patch @@ -1,7 +1,7 @@ Subject: sched: Move mmdrop to RCU on RT From: Thomas Gleixner Date: Mon, 06 Jun 2011 12:20:33 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Takes sleeping locks and calls into the memory allocator, so nothing we want to do in task switch and oder atomic contexts. @@ -115,7 +115,7 @@ Signed-off-by: Thomas Gleixner } /* -@@ -5882,6 +5892,10 @@ int sched_cpu_dying(unsigned int cpu) +@@ -5885,6 +5895,10 @@ int sched_cpu_dying(unsigned int cpu) update_max_interval(); nohz_balance_exit_idle(rq); hrtick_clear(rq); diff --git a/debian/patches-rt/sched-rt-mutex-wakeup.patch b/debian/patches-rt/sched-rt-mutex-wakeup.patch index 121382dee..7be90da93 100644 --- a/debian/patches-rt/sched-rt-mutex-wakeup.patch +++ b/debian/patches-rt/sched-rt-mutex-wakeup.patch @@ -1,7 +1,7 @@ Subject: sched: Add saved_state for tasks blocked on sleeping locks From: Thomas Gleixner Date: Sat, 25 Jun 2011 09:21:04 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Spinlocks are state preserving in !RT. RT changes the state when a task gets blocked on a lock. So we need to remember the state before @@ -27,7 +27,7 @@ Signed-off-by: Thomas Gleixner /* * This begins the randomizable portion of task_struct. Only -@@ -1603,6 +1605,7 @@ extern struct task_struct *find_get_task +@@ -1613,6 +1615,7 @@ extern struct task_struct *find_get_task extern int wake_up_state(struct task_struct *tsk, unsigned int state); extern int wake_up_process(struct task_struct *tsk); @@ -87,7 +87,7 @@ Signed-off-by: Thomas Gleixner return try_to_wake_up(p, state, 0); --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h -@@ -1446,6 +1446,7 @@ static inline int task_on_rq_migrating(s +@@ -1444,6 +1444,7 @@ static inline int task_on_rq_migrating(s #define WF_SYNC 0x01 /* Waker goes to sleep after wakeup */ #define WF_FORK 0x02 /* Child wakeup after fork */ #define WF_MIGRATED 0x4 /* Internal use, task got migrated */ diff --git a/debian/patches-rt/sched-workqueue-Only-wake-up-idle-workers-if-not-blo.patch b/debian/patches-rt/sched-workqueue-Only-wake-up-idle-workers-if-not-blo.patch index f2391de11..56b8ae5d7 100644 --- a/debian/patches-rt/sched-workqueue-Only-wake-up-idle-workers-if-not-blo.patch +++ b/debian/patches-rt/sched-workqueue-Only-wake-up-idle-workers-if-not-blo.patch @@ -1,7 +1,7 @@ From: Steven Rostedt Date: Mon, 18 Mar 2013 15:12:49 -0400 Subject: sched/workqueue: Only wake up idle workers if not blocked on sleeping spin lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz In -rt, most spin_locks() turn into mutexes. One of these spin_lock conversions is performed on the workqueue gcwq->lock. When the idle diff --git a/debian/patches-rt/scsi-fcoe-rt-aware.patch b/debian/patches-rt/scsi-fcoe-rt-aware.patch index 573d88eb6..bed8affd6 100644 --- a/debian/patches-rt/scsi-fcoe-rt-aware.patch +++ b/debian/patches-rt/scsi-fcoe-rt-aware.patch @@ -1,7 +1,7 @@ Subject: scsi/fcoe: Make RT aware. From: Thomas Gleixner Date: Sat, 12 Nov 2011 14:00:48 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Do not disable preemption while taking sleeping locks. All user look safe for migrate_diable() only. diff --git a/debian/patches-rt/seqlock-prevent-rt-starvation.patch b/debian/patches-rt/seqlock-prevent-rt-starvation.patch index eb27edfe5..b73041ed7 100644 --- a/debian/patches-rt/seqlock-prevent-rt-starvation.patch +++ b/debian/patches-rt/seqlock-prevent-rt-starvation.patch @@ -1,7 +1,7 @@ Subject: seqlock: Prevent rt starvation From: Thomas Gleixner Date: Wed, 22 Feb 2012 12:03:30 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz If a low prio writer gets preempted while holding the seqlock write locked, a high prio reader spins forever on RT. diff --git a/debian/patches-rt/series b/debian/patches-rt/series index 55976c4bf..7838ece48 100644 --- a/debian/patches-rt/series +++ b/debian/patches-rt/series @@ -162,6 +162,7 @@ slub-disable-SLUB_CPU_PARTIAL.patch mm-memcontrol-Don-t-call-schedule_work_on-in-preempt.patch mm-memcontrol-do_not_disable_irq.patch mm_zsmalloc_copy_with_get_cpu_var_and_locking.patch +x86-mm-pat-disable-preemption-__split_large_page-aft.patch # RADIX TREE radix-tree-use-local-locks.patch @@ -187,6 +188,7 @@ hrtimer-consolidate-hrtimer_init-hrtimer_init_sleepe.patch hrtimers-prepare-full-preemption.patch hrtimer-by-timers-by-default-into-the-softirq-context.patch hrtimer-Move-schedule_work-call-to-helper-thread.patch +hrtimer-move-state-change-before-hrtimer_cancel-in-d.patch # POSIX-CPU-TIMERS posix-timers-thread-posix-cpu-timers-on-rt.patch @@ -279,6 +281,7 @@ squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch # X86 thermal-Defer-thermal-wakups-to-threads.patch +x86-fpu-Disable-preemption-around-local_bh_disable.patch # CPU get light epoll-use-get-cpu-light.patch @@ -402,6 +405,7 @@ watchdog-prevent-deferral-of-watchdogd-wakeup-on-RT.patch # I915 drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch +drm-i915-disable-tracing-on-RT.patch # CGROUPS cgroups-use-simple-wait-in-css_release.patch diff --git a/debian/patches-rt/signal-revert-ptrace-preempt-magic.patch b/debian/patches-rt/signal-revert-ptrace-preempt-magic.patch index 77b2fea96..5d29462f3 100644 --- a/debian/patches-rt/signal-revert-ptrace-preempt-magic.patch +++ b/debian/patches-rt/signal-revert-ptrace-preempt-magic.patch @@ -1,7 +1,7 @@ Subject: signal: Revert ptrace preempt magic From: Thomas Gleixner Date: Wed, 21 Sep 2011 19:57:12 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Upstream commit '53da1d9456fe7f8 fix ptrace slowness' is nothing more than a bandaid around the ptrace design trainwreck. It's not a diff --git a/debian/patches-rt/signals-allow-rt-tasks-to-cache-one-sigqueue-struct.patch b/debian/patches-rt/signals-allow-rt-tasks-to-cache-one-sigqueue-struct.patch index 9596bb27a..d25a3a0da 100644 --- a/debian/patches-rt/signals-allow-rt-tasks-to-cache-one-sigqueue-struct.patch +++ b/debian/patches-rt/signals-allow-rt-tasks-to-cache-one-sigqueue-struct.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 3 Jul 2009 08:44:56 -0500 Subject: signals: Allow rt tasks to cache one sigqueue struct -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz To avoid allocation allow rt tasks to cache one sigqueue struct in task struct. diff --git a/debian/patches-rt/skbufhead-raw-lock.patch b/debian/patches-rt/skbufhead-raw-lock.patch index 02160ac0d..8e48c6aab 100644 --- a/debian/patches-rt/skbufhead-raw-lock.patch +++ b/debian/patches-rt/skbufhead-raw-lock.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Tue, 12 Jul 2011 15:38:34 +0200 Subject: net: Use skbufhead with raw lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Use the rps lock as rawlock so we can keep irq-off regions. It looks low latency. However we can't kfree() from this context therefore we defer this @@ -34,7 +34,7 @@ Signed-off-by: Thomas Gleixner }; struct sk_buff; -@@ -1675,6 +1676,12 @@ static inline void skb_queue_head_init(s +@@ -1691,6 +1692,12 @@ static inline void skb_queue_head_init(s __skb_queue_head_init(list); } @@ -91,7 +91,7 @@ Signed-off-by: Thomas Gleixner } static void flush_all_backlogs(void) -@@ -5828,7 +5831,9 @@ static int process_backlog(struct napi_s +@@ -5832,7 +5835,9 @@ static int process_backlog(struct napi_s while (again) { struct sk_buff *skb; @@ -101,7 +101,7 @@ Signed-off-by: Thomas Gleixner rcu_read_lock(); __netif_receive_skb(skb); rcu_read_unlock(); -@@ -5836,9 +5841,9 @@ static int process_backlog(struct napi_s +@@ -5840,9 +5845,9 @@ static int process_backlog(struct napi_s if (++work >= quota) return work; @@ -112,7 +112,7 @@ Signed-off-by: Thomas Gleixner rps_lock(sd); if (skb_queue_empty(&sd->input_pkt_queue)) { /* -@@ -6300,13 +6305,21 @@ static __latent_entropy void net_rx_acti +@@ -6307,13 +6312,21 @@ static __latent_entropy void net_rx_acti unsigned long time_limit = jiffies + usecs_to_jiffies(netdev_budget_usecs); int budget = netdev_budget; @@ -134,7 +134,7 @@ Signed-off-by: Thomas Gleixner for (;;) { struct napi_struct *n; -@@ -9292,10 +9305,13 @@ static int dev_cpu_dead(unsigned int old +@@ -9299,10 +9312,13 @@ static int dev_cpu_dead(unsigned int old netif_rx_ni(skb); input_queue_head_incr(oldsd); } @@ -149,7 +149,7 @@ Signed-off-by: Thomas Gleixner return 0; } -@@ -9604,8 +9620,9 @@ static int __init net_dev_init(void) +@@ -9611,8 +9627,9 @@ static int __init net_dev_init(void) INIT_WORK(flush, flush_backlog); diff --git a/debian/patches-rt/slub-disable-SLUB_CPU_PARTIAL.patch b/debian/patches-rt/slub-disable-SLUB_CPU_PARTIAL.patch index bd7ad8fdf..52ae08273 100644 --- a/debian/patches-rt/slub-disable-SLUB_CPU_PARTIAL.patch +++ b/debian/patches-rt/slub-disable-SLUB_CPU_PARTIAL.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 15 Apr 2015 19:00:47 +0200 Subject: slub: Disable SLUB_CPU_PARTIAL -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:915 |in_atomic(): 1, irqs_disabled(): 0, pid: 87, name: rcuop/7 diff --git a/debian/patches-rt/slub-enable-irqs-for-no-wait.patch b/debian/patches-rt/slub-enable-irqs-for-no-wait.patch index 3f042acee..90632730a 100644 --- a/debian/patches-rt/slub-enable-irqs-for-no-wait.patch +++ b/debian/patches-rt/slub-enable-irqs-for-no-wait.patch @@ -1,7 +1,7 @@ Subject: slub: Enable irqs for __GFP_WAIT From: Thomas Gleixner Date: Wed, 09 Jan 2013 12:08:15 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz SYSTEM_RUNNING might be too late for enabling interrupts. Allocations with GFP_WAIT can happen before that. So use this as an indicator. diff --git a/debian/patches-rt/softirq-disable-softirq-stacks-for-rt.patch b/debian/patches-rt/softirq-disable-softirq-stacks-for-rt.patch index bd600a2fa..0276d38d2 100644 --- a/debian/patches-rt/softirq-disable-softirq-stacks-for-rt.patch +++ b/debian/patches-rt/softirq-disable-softirq-stacks-for-rt.patch @@ -1,7 +1,7 @@ Subject: softirq: Disable softirq stacks for RT From: Thomas Gleixner Date: Mon, 18 Jul 2011 13:59:17 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Disable extra stacks for softirqs. We want to preempt softirqs and having them on special IRQ-stack does not make this easier. diff --git a/debian/patches-rt/softirq-preempt-fix-3-re.patch b/debian/patches-rt/softirq-preempt-fix-3-re.patch index 154a41e4f..ed3ba515d 100644 --- a/debian/patches-rt/softirq-preempt-fix-3-re.patch +++ b/debian/patches-rt/softirq-preempt-fix-3-re.patch @@ -1,7 +1,7 @@ Subject: softirq: Check preemption after reenabling interrupts From: Thomas Gleixner Date: Sun, 13 Nov 2011 17:17:09 +0100 (CET) -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz raise_softirq_irqoff() disables interrupts and wakes the softirq daemon, but after reenabling interrupts there is no preemption check, @@ -136,7 +136,7 @@ Signed-off-by: Thomas Gleixner atomic_long_inc(&skb->dev->rx_dropped); kfree_skb(skb); -@@ -5790,12 +5793,14 @@ static void net_rps_action_and_irq_enabl +@@ -5794,12 +5797,14 @@ static void net_rps_action_and_irq_enabl sd->rps_ipi_list = NULL; local_irq_enable(); @@ -151,7 +151,7 @@ Signed-off-by: Thomas Gleixner } static bool sd_has_rps_ipi_waiting(struct softnet_data *sd) -@@ -5873,6 +5878,7 @@ void __napi_schedule(struct napi_struct +@@ -5877,6 +5882,7 @@ void __napi_schedule(struct napi_struct local_irq_save(flags); ____napi_schedule(this_cpu_ptr(&softnet_data), n); local_irq_restore(flags); @@ -159,7 +159,7 @@ Signed-off-by: Thomas Gleixner } EXPORT_SYMBOL(__napi_schedule); -@@ -9274,6 +9280,7 @@ static int dev_cpu_dead(unsigned int old +@@ -9281,6 +9287,7 @@ static int dev_cpu_dead(unsigned int old raise_softirq_irqoff(NET_TX_SOFTIRQ); local_irq_enable(); diff --git a/debian/patches-rt/softirq-split-locks.patch b/debian/patches-rt/softirq-split-locks.patch index 7bd9d4050..04dfb7895 100644 --- a/debian/patches-rt/softirq-split-locks.patch +++ b/debian/patches-rt/softirq-split-locks.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 04 Oct 2012 14:20:47 +0100 Subject: softirq: Split softirq locks -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The 3.x RT series removed the split softirq implementation in favour of pushing softirq processing into the context of the thread which @@ -172,7 +172,7 @@ Signed-off-by: Thomas Gleixner (NMI_MASK | HARDIRQ_MASK | SOFTIRQ_OFFSET))) --- a/include/linux/sched.h +++ b/include/linux/sched.h -@@ -1189,6 +1189,8 @@ struct task_struct { +@@ -1190,6 +1190,8 @@ struct task_struct { #endif #ifdef CONFIG_PREEMPT_RT_BASE struct rcu_head put_rcu; @@ -181,7 +181,7 @@ Signed-off-by: Thomas Gleixner #endif #ifdef CONFIG_DEBUG_ATOMIC_SLEEP unsigned long task_state_change; -@@ -1386,6 +1388,7 @@ extern struct pid *cad_pid; +@@ -1387,6 +1389,7 @@ extern struct pid *cad_pid; /* * Per process flags */ diff --git a/debian/patches-rt/softirq-split-timer-softirqs-out-of-ksoftirqd.patch b/debian/patches-rt/softirq-split-timer-softirqs-out-of-ksoftirqd.patch index 132ad07eb..7dcc6eb92 100644 --- a/debian/patches-rt/softirq-split-timer-softirqs-out-of-ksoftirqd.patch +++ b/debian/patches-rt/softirq-split-timer-softirqs-out-of-ksoftirqd.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 20 Jan 2016 16:34:17 +0100 Subject: softirq: split timer softirqs out of ksoftirqd -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The softirqd runs in -RT with SCHED_FIFO (prio 1) and deals mostly with timer wakeup which can not happen in hardirq context. The prio has been diff --git a/debian/patches-rt/spinlock-types-separate-raw.patch b/debian/patches-rt/spinlock-types-separate-raw.patch index ed74a69f5..444157fad 100644 --- a/debian/patches-rt/spinlock-types-separate-raw.patch +++ b/debian/patches-rt/spinlock-types-separate-raw.patch @@ -1,7 +1,7 @@ Subject: spinlock: Split the lock types header From: Thomas Gleixner Date: Wed, 29 Jun 2011 19:34:01 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Split raw_spinlock into its own file and the remaining spinlock_t into its own non-RT header. The non-RT header will be replaced later by sleeping diff --git a/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch b/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch index 9a9f9a90c..8b2fd1c40 100644 --- a/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch +++ b/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch @@ -2,7 +2,7 @@ From: Julia Cartwright Date: Mon, 7 May 2018 08:58:57 -0500 Subject: [PATCH] squashfs: make use of local lock in multi_cpu decompressor -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Currently, the squashfs multi_cpu decompressor makes use of get_cpu_ptr()/put_cpu_ptr(), which unconditionally disable preemption diff --git a/debian/patches-rt/srcu-replace-local_irqsave-with-a-locallock.patch b/debian/patches-rt/srcu-replace-local_irqsave-with-a-locallock.patch index 37b03af73..c23f15edb 100644 --- a/debian/patches-rt/srcu-replace-local_irqsave-with-a-locallock.patch +++ b/debian/patches-rt/srcu-replace-local_irqsave-with-a-locallock.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 12 Oct 2017 18:37:12 +0200 Subject: [PATCH] srcu: replace local_irqsave() with a locallock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz There are two instances which disable interrupts in order to become a stable this_cpu_ptr() pointer. The restore part is coupled with diff --git a/debian/patches-rt/srcu-use-cpu_online-instead-custom-check.patch b/debian/patches-rt/srcu-use-cpu_online-instead-custom-check.patch index 6eaadde11..4655cd3f6 100644 --- a/debian/patches-rt/srcu-use-cpu_online-instead-custom-check.patch +++ b/debian/patches-rt/srcu-use-cpu_online-instead-custom-check.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 13 Sep 2017 14:43:41 +0200 Subject: [PATCH] srcu: use cpu_online() instead custom check -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The current check via srcu_online is slightly racy because after looking at srcu_online there could be an interrupt that interrupted us long @@ -68,7 +68,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c -@@ -3767,8 +3767,6 @@ int rcutree_online_cpu(unsigned int cpu) +@@ -3776,8 +3776,6 @@ int rcutree_online_cpu(unsigned int cpu) rnp->ffmask |= rdp->grpmask; raw_spin_unlock_irqrestore_rcu_node(rnp, flags); } @@ -77,7 +77,7 @@ Signed-off-by: Sebastian Andrzej Siewior if (rcu_scheduler_active == RCU_SCHEDULER_INACTIVE) return 0; /* Too early in boot for scheduler work. */ sync_sched_exp_online_cleanup(cpu); -@@ -3796,8 +3794,6 @@ int rcutree_offline_cpu(unsigned int cpu +@@ -3805,8 +3803,6 @@ int rcutree_offline_cpu(unsigned int cpu } rcutree_affinity_setting(cpu, cpu); diff --git a/debian/patches-rt/sunrpc-make-svc_xprt_do_enqueue-use-get_cpu_light.patch b/debian/patches-rt/sunrpc-make-svc_xprt_do_enqueue-use-get_cpu_light.patch index 00e64b277..4fda2b27f 100644 --- a/debian/patches-rt/sunrpc-make-svc_xprt_do_enqueue-use-get_cpu_light.patch +++ b/debian/patches-rt/sunrpc-make-svc_xprt_do_enqueue-use-get_cpu_light.patch @@ -1,7 +1,7 @@ From: Mike Galbraith Date: Wed, 18 Feb 2015 16:05:28 +0100 Subject: sunrpc: Make svc_xprt_do_enqueue() use get_cpu_light() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:915 |in_atomic(): 1, irqs_disabled(): 0, pid: 3194, name: rpc.nfsd diff --git a/debian/patches-rt/sysfs-realtime-entry.patch b/debian/patches-rt/sysfs-realtime-entry.patch index 21f3d510d..0d676daf8 100644 --- a/debian/patches-rt/sysfs-realtime-entry.patch +++ b/debian/patches-rt/sysfs-realtime-entry.patch @@ -1,7 +1,7 @@ Subject: sysfs: Add /sys/kernel/realtime entry From: Clark Williams Date: Sat Jul 30 21:55:53 2011 -0500 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Add a /sys/kernel entry to indicate that the kernel is a realtime kernel. diff --git a/debian/patches-rt/tasklet-rt-prevent-tasklets-from-going-into-infinite-spin-in-rt.patch b/debian/patches-rt/tasklet-rt-prevent-tasklets-from-going-into-infinite-spin-in-rt.patch index 98d45801b..dbd00b429 100644 --- a/debian/patches-rt/tasklet-rt-prevent-tasklets-from-going-into-infinite-spin-in-rt.patch +++ b/debian/patches-rt/tasklet-rt-prevent-tasklets-from-going-into-infinite-spin-in-rt.patch @@ -1,7 +1,7 @@ Subject: tasklet: Prevent tasklets from going into infinite spin in RT From: Ingo Molnar Date: Tue Nov 29 20:18:22 2011 -0500 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz When CONFIG_PREEMPT_RT_FULL is enabled, tasklets run as threads, and spinlocks turn are mutexes. But this can cause issues with diff --git a/debian/patches-rt/thermal-Defer-thermal-wakups-to-threads.patch b/debian/patches-rt/thermal-Defer-thermal-wakups-to-threads.patch index 018f515bf..05048c8fe 100644 --- a/debian/patches-rt/thermal-Defer-thermal-wakups-to-threads.patch +++ b/debian/patches-rt/thermal-Defer-thermal-wakups-to-threads.patch @@ -1,7 +1,7 @@ From: Daniel Wagner Date: Tue, 17 Feb 2015 09:37:44 +0100 Subject: thermal: Defer thermal wakups to threads -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz On RT the spin lock in pkg_temp_thermal_platfrom_thermal_notify will call schedule while we run in irq context. diff --git a/debian/patches-rt/time-hrtimer-avoid-schedule_work-with-interrupts-dis.patch b/debian/patches-rt/time-hrtimer-avoid-schedule_work-with-interrupts-dis.patch index 327e71793..edae9d3ca 100644 --- a/debian/patches-rt/time-hrtimer-avoid-schedule_work-with-interrupts-dis.patch +++ b/debian/patches-rt/time-hrtimer-avoid-schedule_work-with-interrupts-dis.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 15 Nov 2017 17:29:51 +0100 Subject: [PATCH] time/hrtimer: avoid schedule_work() with interrupts disabled -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz The NOHZ code tries to schedule a workqueue with interrupts disabled. Since this does not work -RT I am switching it to swork instead. diff --git a/debian/patches-rt/timekeeping-split-jiffies-lock.patch b/debian/patches-rt/timekeeping-split-jiffies-lock.patch index 9990ac949..8b719e2af 100644 --- a/debian/patches-rt/timekeeping-split-jiffies-lock.patch +++ b/debian/patches-rt/timekeeping-split-jiffies-lock.patch @@ -1,7 +1,7 @@ Subject: timekeeping: Split jiffies seqlock From: Thomas Gleixner Date: Thu, 14 Feb 2013 22:36:59 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Replace jiffies_lock seqlock with a simple seqcounter and a rawlock so it can be taken in atomic context on RT. diff --git a/debian/patches-rt/timers-prepare-for-full-preemption.patch b/debian/patches-rt/timers-prepare-for-full-preemption.patch index 6dcafcb6a..8b52598b3 100644 --- a/debian/patches-rt/timers-prepare-for-full-preemption.patch +++ b/debian/patches-rt/timers-prepare-for-full-preemption.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:29:34 -0500 Subject: timers: Prepare for full preemption -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz When softirqs can be preempted we need to make sure that cancelling the timer from the active thread can not deadlock vs. a running timer diff --git a/debian/patches-rt/tpm_tis-fix-stall-after-iowrite-s.patch b/debian/patches-rt/tpm_tis-fix-stall-after-iowrite-s.patch index 62d84a21e..a06d11eee 100644 --- a/debian/patches-rt/tpm_tis-fix-stall-after-iowrite-s.patch +++ b/debian/patches-rt/tpm_tis-fix-stall-after-iowrite-s.patch @@ -1,7 +1,7 @@ From: Haris Okanovic Date: Tue, 15 Aug 2017 15:13:08 -0500 Subject: [PATCH] tpm_tis: fix stall after iowrite*()s -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz ioread8() operations to TPM MMIO addresses can stall the cpu when immediately following a sequence of iowrite*()'s to the same region. diff --git a/debian/patches-rt/tty-serial-8250-don-t-take-the-trylock-during-oops.patch b/debian/patches-rt/tty-serial-8250-don-t-take-the-trylock-during-oops.patch index b5f87d082..9879536bf 100644 --- a/debian/patches-rt/tty-serial-8250-don-t-take-the-trylock-during-oops.patch +++ b/debian/patches-rt/tty-serial-8250-don-t-take-the-trylock-during-oops.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 11 Apr 2016 16:55:02 +0200 Subject: [PATCH] tty: serial: 8250: don't take the trylock during oops -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz An oops with irqs off (panic() from irqsafe hrtimer like the watchdog timer) will lead to a lockdep warning on each invocation and as such diff --git a/debian/patches-rt/tty-serial-pl011-warning-about-uninitialized.patch b/debian/patches-rt/tty-serial-pl011-warning-about-uninitialized.patch index a53f10e12..623fc24b3 100644 --- a/debian/patches-rt/tty-serial-pl011-warning-about-uninitialized.patch +++ b/debian/patches-rt/tty-serial-pl011-warning-about-uninitialized.patch @@ -4,7 +4,7 @@ Subject: [PATCH] tty: serial: pl011: explicitly initialize the flags variable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Silence the following gcc warning: diff --git a/debian/patches-rt/upstream-net-rt-remove-preemption-disabling-in-netif_rx.patch b/debian/patches-rt/upstream-net-rt-remove-preemption-disabling-in-netif_rx.patch index 0067cd303..d8245a363 100644 --- a/debian/patches-rt/upstream-net-rt-remove-preemption-disabling-in-netif_rx.patch +++ b/debian/patches-rt/upstream-net-rt-remove-preemption-disabling-in-netif_rx.patch @@ -1,7 +1,7 @@ Subject: net: Remove preemption disabling in netif_rx() From: Priyanka Jain Date: Thu, 17 May 2012 09:35:11 +0530 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz 1)enqueue_to_backlog() (called from netif_rx) should be bind to a particluar CPU. This can be achieved by diff --git a/debian/patches-rt/usb-do-not-disable-interrupts-in-giveback.patch b/debian/patches-rt/usb-do-not-disable-interrupts-in-giveback.patch index ff0c3ee21..bb4b91e3c 100644 --- a/debian/patches-rt/usb-do-not-disable-interrupts-in-giveback.patch +++ b/debian/patches-rt/usb-do-not-disable-interrupts-in-giveback.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 8 Nov 2013 17:34:54 +0100 Subject: usb: do no disable interrupts in giveback -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Since commit 94dfd7ed ("USB: HCD: support giveback of URB in tasklet context") the USB code disables interrupts before invoking the complete diff --git a/debian/patches-rt/wait.h-include-atomic.h.patch b/debian/patches-rt/wait.h-include-atomic.h.patch index 2f6f6dc6d..831db0da5 100644 --- a/debian/patches-rt/wait.h-include-atomic.h.patch +++ b/debian/patches-rt/wait.h-include-atomic.h.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 28 Oct 2013 12:19:57 +0100 Subject: wait.h: include atomic.h -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz | CC init/main.o |In file included from include/linux/mmzone.h:9:0, diff --git a/debian/patches-rt/watchdog-prevent-deferral-of-watchdogd-wakeup-on-RT.patch b/debian/patches-rt/watchdog-prevent-deferral-of-watchdogd-wakeup-on-RT.patch index e9d02fc10..5350e69d5 100644 --- a/debian/patches-rt/watchdog-prevent-deferral-of-watchdogd-wakeup-on-RT.patch +++ b/debian/patches-rt/watchdog-prevent-deferral-of-watchdogd-wakeup-on-RT.patch @@ -1,7 +1,7 @@ From: Julia Cartwright Date: Fri, 28 Sep 2018 21:03:51 +0000 Subject: [PATCH] watchdog: prevent deferral of watchdogd wakeup on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz When PREEMPT_RT_FULL is enabled, all hrtimer expiry functions are deferred for execution into the context of ktimersoftd unless otherwise diff --git a/debian/patches-rt/work-queue-work-around-irqsafe-timer-optimization.patch b/debian/patches-rt/work-queue-work-around-irqsafe-timer-optimization.patch index 4d33b4118..08ec9b31f 100644 --- a/debian/patches-rt/work-queue-work-around-irqsafe-timer-optimization.patch +++ b/debian/patches-rt/work-queue-work-around-irqsafe-timer-optimization.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Mon, 01 Jul 2013 11:02:42 +0200 Subject: workqueue: Prevent workqueue versus ata-piix livelock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz An Intel i7 system regularly detected rcu_preempt stalls after the kernel was upgraded from 3.6-rt to 3.8-rt. When the stall happened, disk I/O was no diff --git a/debian/patches-rt/work-simple-Simple-work-queue-implemenation.patch b/debian/patches-rt/work-simple-Simple-work-queue-implemenation.patch index dec488759..b5c03f0a3 100644 --- a/debian/patches-rt/work-simple-Simple-work-queue-implemenation.patch +++ b/debian/patches-rt/work-simple-Simple-work-queue-implemenation.patch @@ -1,7 +1,7 @@ From: Daniel Wagner Date: Fri, 11 Jul 2014 15:26:11 +0200 Subject: work-simple: Simple work queue implemenation -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Provides a framework for enqueuing callbacks from irq context PREEMPT_RT_FULL safe. The callbacks are executed in kthread context. diff --git a/debian/patches-rt/work-simple-drop-a-shit-statement-in-SWORK_EVENT_PEN.patch b/debian/patches-rt/work-simple-drop-a-shit-statement-in-SWORK_EVENT_PEN.patch index 096ae011f..87f5e3469 100644 --- a/debian/patches-rt/work-simple-drop-a-shit-statement-in-SWORK_EVENT_PEN.patch +++ b/debian/patches-rt/work-simple-drop-a-shit-statement-in-SWORK_EVENT_PEN.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 10 Sep 2018 18:00:31 +0200 Subject: [PATCH] work-simple: drop a shit statement in SWORK_EVENT_PENDING -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Dan Carpenter reported | smatch warnings: diff --git a/debian/patches-rt/workqueue-distangle-from-rq-lock.patch b/debian/patches-rt/workqueue-distangle-from-rq-lock.patch index 2ed3ca530..06b228840 100644 --- a/debian/patches-rt/workqueue-distangle-from-rq-lock.patch +++ b/debian/patches-rt/workqueue-distangle-from-rq-lock.patch @@ -22,7 +22,7 @@ Cc: Jens Axboe Cc: Linus Torvalds Link: http://lkml.kernel.org/r/20110622174919.135236139@linutronix.de Signed-off-by: Thomas Gleixner -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz [bigeasy: preempt_disable() around wq_worker_sleeping() by Daniel Bristot de Oliveira] diff --git a/debian/patches-rt/workqueue-prevent-deadlock-stall.patch b/debian/patches-rt/workqueue-prevent-deadlock-stall.patch index f3111651e..9bc34b09a 100644 --- a/debian/patches-rt/workqueue-prevent-deadlock-stall.patch +++ b/debian/patches-rt/workqueue-prevent-deadlock-stall.patch @@ -1,7 +1,7 @@ Subject: workqueue: Prevent deadlock/stall on RT From: Thomas Gleixner Date: Fri, 27 Jun 2014 16:24:52 +0200 (CEST) -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Austin reported a XFS deadlock/stall on RT where scheduled work gets never exececuted and tasks are waiting for each other for ever. diff --git a/debian/patches-rt/workqueue-use-locallock.patch b/debian/patches-rt/workqueue-use-locallock.patch index 191a90318..ae89a114c 100644 --- a/debian/patches-rt/workqueue-use-locallock.patch +++ b/debian/patches-rt/workqueue-use-locallock.patch @@ -1,7 +1,7 @@ Subject: workqueue: Use local irq lock instead of irq disable regions From: Thomas Gleixner Date: Sun, 17 Jul 2011 21:42:26 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Use a local_irq_lock as a replacement for irq off regions. We keep the semantic of irq-off in regard to the pool->lock and remain preemptible. diff --git a/debian/patches-rt/workqueue-use-rcu.patch b/debian/patches-rt/workqueue-use-rcu.patch index e22532ae1..ebdcd2efd 100644 --- a/debian/patches-rt/workqueue-use-rcu.patch +++ b/debian/patches-rt/workqueue-use-rcu.patch @@ -1,7 +1,7 @@ Subject: workqueue: Use normal rcu From: Thomas Gleixner Date: Wed, 24 Jul 2013 15:26:54 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz There is no need for sched_rcu. The undocumented reason why sched_rcu is used is to avoid a few explicit rcu_read_lock()/unlock() pairs by diff --git a/debian/patches-rt/x86-crypto-reduce-preempt-disabled-regions.patch b/debian/patches-rt/x86-crypto-reduce-preempt-disabled-regions.patch index 8565e6089..40ff9ba82 100644 --- a/debian/patches-rt/x86-crypto-reduce-preempt-disabled-regions.patch +++ b/debian/patches-rt/x86-crypto-reduce-preempt-disabled-regions.patch @@ -1,7 +1,7 @@ Subject: x86: crypto: Reduce preempt disabled regions From: Peter Zijlstra Date: Mon, 14 Nov 2011 18:19:27 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Restrict the preempt disabled regions to the actual floating point operations and enable preemption for the administrative actions. diff --git a/debian/patches-rt/x86-efi-drop-task_lock-from-efi_switch_mm.patch b/debian/patches-rt/x86-efi-drop-task_lock-from-efi_switch_mm.patch index eb3643eb0..0e62d2920 100644 --- a/debian/patches-rt/x86-efi-drop-task_lock-from-efi_switch_mm.patch +++ b/debian/patches-rt/x86-efi-drop-task_lock-from-efi_switch_mm.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 24 Jul 2018 14:48:55 +0200 Subject: [PATCH] x86/efi: drop task_lock() from efi_switch_mm() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz efi_switch_mm() is a wrapper around switch_mm() which saves current's ->active_mm, sets the requests mm as ->active_mm and invokes diff --git a/debian/patches-rt/x86-fpu-Disable-preemption-around-local_bh_disable.patch b/debian/patches-rt/x86-fpu-Disable-preemption-around-local_bh_disable.patch new file mode 100644 index 000000000..7245a12d6 --- /dev/null +++ b/debian/patches-rt/x86-fpu-Disable-preemption-around-local_bh_disable.patch @@ -0,0 +1,32 @@ +From: Sebastian Andrzej Siewior +Date: Tue, 11 Dec 2018 15:10:33 +0100 +Subject: [PATCH] x86/fpu: Disable preemption around local_bh_disable() +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz + +__fpu__restore_sig() restores the content of the FPU state in the CPUs +and in order to avoid concurency it disbles BH. On !RT it also disables +preemption but on RT we can get preempted in BH. + +Add preempt_disable() while the FPU state is restored. + +Cc: stable-rt@vger.kernel.org +Signed-off-by: Sebastian Andrzej Siewior +--- + arch/x86/kernel/fpu/signal.c | 2 ++ + 1 file changed, 2 insertions(+) + +--- a/arch/x86/kernel/fpu/signal.c ++++ b/arch/x86/kernel/fpu/signal.c +@@ -344,10 +344,12 @@ static int __fpu__restore_sig(void __use + sanitize_restored_xstate(tsk, &env, xfeatures, fx_only); + } + ++ preempt_disable(); + local_bh_disable(); + fpu->initialized = 1; + fpu__restore(fpu); + local_bh_enable(); ++ preempt_enable(); + + return err; + } else { diff --git a/debian/patches-rt/x86-highmem-add-a-already-used-pte-check.patch b/debian/patches-rt/x86-highmem-add-a-already-used-pte-check.patch index 46ed25421..fa4537210 100644 --- a/debian/patches-rt/x86-highmem-add-a-already-used-pte-check.patch +++ b/debian/patches-rt/x86-highmem-add-a-already-used-pte-check.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 11 Mar 2013 17:09:55 +0100 Subject: x86/highmem: Add a "already used pte" check -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz This is a copy from kmap_atomic_prot(). diff --git a/debian/patches-rt/x86-ioapic-Don-t-let-setaffinity-unmask-threaded-EOI.patch b/debian/patches-rt/x86-ioapic-Don-t-let-setaffinity-unmask-threaded-EOI.patch index 1940d633a..00865bd4c 100644 --- a/debian/patches-rt/x86-ioapic-Don-t-let-setaffinity-unmask-threaded-EOI.patch +++ b/debian/patches-rt/x86-ioapic-Don-t-let-setaffinity-unmask-threaded-EOI.patch @@ -2,7 +2,7 @@ From: Thomas Gleixner Date: Tue, 17 Jul 2018 18:25:31 +0200 Subject: [PATCH] x86/ioapic: Don't let setaffinity unmask threaded EOI interrupt too early -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz There is an issue with threaded interrupts which are marked ONESHOT and using the fasteoi handler. diff --git a/debian/patches-rt/x86-kvm-require-const-tsc-for-rt.patch b/debian/patches-rt/x86-kvm-require-const-tsc-for-rt.patch index b84f6f2e9..bef74ed44 100644 --- a/debian/patches-rt/x86-kvm-require-const-tsc-for-rt.patch +++ b/debian/patches-rt/x86-kvm-require-const-tsc-for-rt.patch @@ -1,7 +1,7 @@ Subject: x86: kvm Require const tsc for RT From: Thomas Gleixner Date: Sun, 06 Nov 2011 12:26:18 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Non constant TSC is a nightmare on bare metal already, but with virtualization it becomes a complete disaster because the workarounds diff --git a/debian/patches-rt/x86-mm-pat-disable-preemption-__split_large_page-aft.patch b/debian/patches-rt/x86-mm-pat-disable-preemption-__split_large_page-aft.patch new file mode 100644 index 000000000..1179b30b6 --- /dev/null +++ b/debian/patches-rt/x86-mm-pat-disable-preemption-__split_large_page-aft.patch @@ -0,0 +1,55 @@ +From: Sebastian Andrzej Siewior +Date: Tue, 11 Dec 2018 21:53:43 +0100 +Subject: [PATCH] x86/mm/pat: disable preemption __split_large_page() after + spin_lock() +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz + +Commit "x86/mm/pat: Disable preemption around __flush_tlb_all()" added a +warning if __flush_tlb_all() is invoked in preemptible context. On !RT +the warning does not trigger because a spin lock is acquired which +disables preemption. On RT the spin lock does not disable preemption and +so the warning is seen. + +Disable preemption to avoid the warning __flush_tlb_all(). + +Signed-off-by: Sebastian Andrzej Siewior +--- + arch/x86/mm/pageattr.c | 8 ++++++++ + 1 file changed, 8 insertions(+) + +--- a/arch/x86/mm/pageattr.c ++++ b/arch/x86/mm/pageattr.c +@@ -688,11 +688,17 @@ static int + + spin_lock(&pgd_lock); + /* ++ * Keep preemption disabled after __flush_tlb_all() which expects not be ++ * preempted during the flush of the local TLB. ++ */ ++ preempt_disable(); ++ /* + * Check for races, another CPU might have split this page + * up for us already: + */ + tmp = _lookup_address_cpa(cpa, address, &level); + if (tmp != kpte) { ++ preempt_enable(); + spin_unlock(&pgd_lock); + return 1; + } +@@ -726,6 +732,7 @@ static int + break; + + default: ++ preempt_enable(); + spin_unlock(&pgd_lock); + return 1; + } +@@ -764,6 +771,7 @@ static int + * going on. + */ + __flush_tlb_all(); ++ preempt_enable(); + spin_unlock(&pgd_lock); + + return 0; diff --git a/debian/patches-rt/x86-preempt-lazy.patch b/debian/patches-rt/x86-preempt-lazy.patch index 26432a892..9a8d149fa 100644 --- a/debian/patches-rt/x86-preempt-lazy.patch +++ b/debian/patches-rt/x86-preempt-lazy.patch @@ -1,7 +1,7 @@ Subject: x86: Support for lazy preemption From: Thomas Gleixner Date: Thu, 01 Nov 2012 11:03:47 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Implement the x86 pieces for lazy preempt. @@ -177,23 +177,23 @@ Signed-off-by: Thomas Gleixner #endif /* -@@ -83,6 +90,7 @@ struct thread_info { - #define TIF_SYSCALL_EMU 6 /* syscall emulation active */ - #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ - #define TIF_SECCOMP 8 /* secure computing */ -+#define TIF_NEED_RESCHED_LAZY 9 /* lazy rescheduling necessary */ - #define TIF_USER_RETURN_NOTIFY 11 /* notify kernel of userspace return */ - #define TIF_UPROBE 12 /* breakpointed or singlestepping */ - #define TIF_PATCH_PENDING 13 /* pending live patching update */ -@@ -110,6 +118,7 @@ struct thread_info { - #define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU) - #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) - #define _TIF_SECCOMP (1 << TIF_SECCOMP) +@@ -91,6 +98,7 @@ struct thread_info { + #define TIF_NOCPUID 15 /* CPUID is not accessible in userland */ + #define TIF_NOTSC 16 /* TSC is not accessible in userland */ + #define TIF_IA32 17 /* IA32 compatibility process */ ++#define TIF_NEED_RESCHED_LAZY 18 /* lazy rescheduling necessary */ + #define TIF_NOHZ 19 /* in adaptive nohz mode */ + #define TIF_MEMDIE 20 /* is terminating due to OOM killer */ + #define TIF_POLLING_NRFLAG 21 /* idle is polling for TIF_NEED_RESCHED */ +@@ -120,6 +128,7 @@ struct thread_info { + #define _TIF_NOCPUID (1 << TIF_NOCPUID) + #define _TIF_NOTSC (1 << TIF_NOTSC) + #define _TIF_IA32 (1 << TIF_IA32) +#define _TIF_NEED_RESCHED_LAZY (1 << TIF_NEED_RESCHED_LAZY) - #define _TIF_USER_RETURN_NOTIFY (1 << TIF_USER_RETURN_NOTIFY) - #define _TIF_UPROBE (1 << TIF_UPROBE) - #define _TIF_PATCH_PENDING (1 << TIF_PATCH_PENDING) -@@ -151,6 +160,8 @@ struct thread_info { + #define _TIF_NOHZ (1 << TIF_NOHZ) + #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) + #define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP) +@@ -165,6 +174,8 @@ struct thread_info { #define _TIF_WORK_CTXSW_PREV (_TIF_WORK_CTXSW|_TIF_USER_RETURN_NOTIFY) #define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW) diff --git a/debian/patches-rt/x86-signal-delay-calling-signals-on-32bit.patch b/debian/patches-rt/x86-signal-delay-calling-signals-on-32bit.patch index e5e7701ea..cd681f398 100644 --- a/debian/patches-rt/x86-signal-delay-calling-signals-on-32bit.patch +++ b/debian/patches-rt/x86-signal-delay-calling-signals-on-32bit.patch @@ -1,7 +1,7 @@ From: Yang Shi Date: Thu, 10 Dec 2015 10:58:51 -0800 Subject: x86/signal: delay calling signals on 32bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz When running some ptrace single step tests on x86-32 machine, the below problem is triggered: diff --git a/debian/patches-rt/x86-stackprot-no-random-on-rt.patch b/debian/patches-rt/x86-stackprot-no-random-on-rt.patch index 32b141d83..477106414 100644 --- a/debian/patches-rt/x86-stackprot-no-random-on-rt.patch +++ b/debian/patches-rt/x86-stackprot-no-random-on-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 16 Dec 2010 14:25:18 +0100 Subject: x86: stackprotector: Avoid random pool on rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz CPU bringup calls into the random pool to initialize the stack canary. During boot that works nicely even on RT as the might sleep diff --git a/debian/patches-rt/x86-use-gen-rwsem-spinlocks-rt.patch b/debian/patches-rt/x86-use-gen-rwsem-spinlocks-rt.patch index fe95c64b7..082124a2a 100644 --- a/debian/patches-rt/x86-use-gen-rwsem-spinlocks-rt.patch +++ b/debian/patches-rt/x86-use-gen-rwsem-spinlocks-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Sun, 26 Jul 2009 02:21:32 +0200 Subject: x86: Use generic rwsem_spinlocks on -rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.5-rt4.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz Simplifies the separation of anon_rw_semaphores and rw_semaphores for -rt.