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[rt] Update to 4.4-rt2

This commit is contained in:
Ben Hutchings 2016-01-15 13:23:17 +00:00
parent 2f5878146d
commit fbee7ded77
258 changed files with 319 additions and 354 deletions
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1
debian/changelog vendored
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@ -5,6 +5,7 @@ linux (4.4-1~exp1) UNRELEASED; urgency=medium
[ Ben Hutchings ] [ Ben Hutchings ]
* [armhf] Enable EXTCON_USB_GPIO, ENSORS_GPIO_FAN as modules, and * [armhf] Enable EXTCON_USB_GPIO, ENSORS_GPIO_FAN as modules, and
USB_DWC3_DUAL_ROLE instead of USB_DWC3_HOST (Closes: #810048) USB_DWC3_DUAL_ROLE instead of USB_DWC3_HOST (Closes: #810048)
* [rt] Update to 4.4-rt2
-- Ben Hutchings <ben@decadent.org.uk> Wed, 06 Jan 2016 01:28:46 +0000 -- Ben Hutchings <ben@decadent.org.uk> Wed, 06 Jan 2016 01:28:46 +0000

2
debian/patches/features/all/rt/0005-futex-Ensure-lock-unlock-symetry-versus-pi_lock-and-.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 1 Mar 2013 11:17:42 +0100 Date: Fri, 1 Mar 2013 11:17:42 +0100
Subject: futex: Ensure lock/unlock symetry versus pi_lock and hash bucket lock Subject: futex: Ensure lock/unlock symetry versus pi_lock and hash bucket lock
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
In exit_pi_state_list() we have the following locking construct: In exit_pi_state_list() we have the following locking construct:

2
debian/patches/features/all/rt/0009-ARM-OMAP2-Drop-the-concept-of-certain-power-domains-.patch vendored
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@ -3,7 +3,7 @@ From: Russ Dill <Russ.Dill@ti.com>
Date: Wed, 5 Aug 2015 15:30:44 +0530 Date: Wed, 5 Aug 2015 15:30:44 +0530
Subject: [PATCH 09/21] ARM: OMAP2: Drop the concept of certain power domains Subject: [PATCH 09/21] ARM: OMAP2: Drop the concept of certain power domains
not being able to lose context. not being able to lose context.
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
It isn't much of a win, and with hibernation, everything loses context. It isn't much of a win, and with hibernation, everything loses context.

2
debian/patches/features/all/rt/ARM-enable-irq-in-translation-section-permission-fau.patch vendored
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@ -1,7 +1,7 @@
From: "Yadi.hu" <yadi.hu@windriver.com> From: "Yadi.hu" <yadi.hu@windriver.com>
Date: Wed, 10 Dec 2014 10:32:09 +0800 Date: Wed, 10 Dec 2014 10:32:09 +0800
Subject: ARM: enable irq in translation/section permission fault handlers Subject: ARM: enable irq in translation/section permission fault handlers
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Probably happens on all ARM, with Probably happens on all ARM, with
CONFIG_PREEMPT_RT_FULL CONFIG_PREEMPT_RT_FULL

2
debian/patches/features/all/rt/HACK-printk-drop-the-logbuf_lock-more-often.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 21 Mar 2013 19:01:05 +0100 Date: Thu, 21 Mar 2013 19:01:05 +0100
Subject: printk: Drop the logbuf_lock more often Subject: printk: Drop the logbuf_lock more often
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The lock is hold with irgs off. The latency drops 500us+ on my arm bugs 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. with a "full" buffer after executing "dmesg" on the shell.

2
debian/patches/features/all/rt/KVM-lapic-mark-LAPIC-timer-handler-as-irqsafe.patch vendored
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@ -1,7 +1,7 @@
From: Marcelo Tosatti <mtosatti@redhat.com> From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Wed, 8 Apr 2015 20:33:25 -0300 Date: Wed, 8 Apr 2015 20:33:25 -0300
Subject: KVM: lapic: mark LAPIC timer handler as irqsafe Subject: KVM: lapic: mark LAPIC timer handler as irqsafe
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Since lapic timer handler only wakes up a simple waitqueue, Since lapic timer handler only wakes up a simple waitqueue,
it can be executed from hardirq context. it can be executed from hardirq context.

14
debian/patches/features/all/rt/KVM-use-simple-waitqueue-for-vcpu-wq.patch vendored
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@ -1,7 +1,7 @@
From: Marcelo Tosatti <mtosatti@redhat.com> From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Wed, 8 Apr 2015 20:33:24 -0300 Date: Wed, 8 Apr 2015 20:33:24 -0300
Subject: KVM: use simple waitqueue for vcpu->wq Subject: KVM: use simple waitqueue for vcpu->wq
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The problem: The problem:
@ -127,7 +127,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
++vcpu->stat.halt_wakeup; ++vcpu->stat.halt_wakeup;
} }
@@ -701,8 +701,8 @@ int kvmppc_pseries_do_hcall(struct kvm_v @@ -707,8 +707,8 @@ int kvmppc_pseries_do_hcall(struct kvm_v
tvcpu->arch.prodded = 1; tvcpu->arch.prodded = 1;
smp_mb(); smp_mb();
if (vcpu->arch.ceded) { if (vcpu->arch.ceded) {
@ -138,7 +138,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
vcpu->stat.halt_wakeup++; vcpu->stat.halt_wakeup++;
} }
} }
@@ -1441,7 +1441,7 @@ static struct kvmppc_vcore *kvmppc_vcore @@ -1447,7 +1447,7 @@ static struct kvmppc_vcore *kvmppc_vcore
INIT_LIST_HEAD(&vcore->runnable_threads); INIT_LIST_HEAD(&vcore->runnable_threads);
spin_lock_init(&vcore->lock); spin_lock_init(&vcore->lock);
spin_lock_init(&vcore->stoltb_lock); spin_lock_init(&vcore->stoltb_lock);
@ -147,7 +147,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
vcore->preempt_tb = TB_NIL; vcore->preempt_tb = TB_NIL;
vcore->lpcr = kvm->arch.lpcr; vcore->lpcr = kvm->arch.lpcr;
vcore->first_vcpuid = core * threads_per_subcore; vcore->first_vcpuid = core * threads_per_subcore;
@@ -2513,10 +2513,9 @@ static void kvmppc_vcore_blocked(struct @@ -2519,10 +2519,9 @@ static void kvmppc_vcore_blocked(struct
{ {
struct kvm_vcpu *vcpu; struct kvm_vcpu *vcpu;
int do_sleep = 1; int do_sleep = 1;
@ -160,7 +160,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
/* /*
* Check one last time for pending exceptions and ceded state after * Check one last time for pending exceptions and ceded state after
@@ -2530,7 +2529,7 @@ static void kvmppc_vcore_blocked(struct @@ -2536,7 +2535,7 @@ static void kvmppc_vcore_blocked(struct
} }
if (!do_sleep) { if (!do_sleep) {
@ -169,7 +169,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
return; return;
} }
@@ -2538,7 +2537,7 @@ static void kvmppc_vcore_blocked(struct @@ -2544,7 +2543,7 @@ static void kvmppc_vcore_blocked(struct
trace_kvmppc_vcore_blocked(vc, 0); trace_kvmppc_vcore_blocked(vc, 0);
spin_unlock(&vc->lock); spin_unlock(&vc->lock);
schedule(); schedule();
@ -178,7 +178,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
spin_lock(&vc->lock); spin_lock(&vc->lock);
vc->vcore_state = VCORE_INACTIVE; vc->vcore_state = VCORE_INACTIVE;
trace_kvmppc_vcore_blocked(vc, 1); trace_kvmppc_vcore_blocked(vc, 1);
@@ -2594,7 +2593,7 @@ static int kvmppc_run_vcpu(struct kvm_ru @@ -2600,7 +2599,7 @@ static int kvmppc_run_vcpu(struct kvm_ru
kvmppc_start_thread(vcpu, vc); kvmppc_start_thread(vcpu, vc);
trace_kvm_guest_enter(vcpu); trace_kvm_guest_enter(vcpu);
} else if (vc->vcore_state == VCORE_SLEEPING) { } else if (vc->vcore_state == VCORE_SLEEPING) {

2
debian/patches/features/all/rt/acpi-rt-Convert-acpi_gbl_hardware-lock-back-to-a-raw.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org> From: Steven Rostedt <rostedt@goodmis.org>
Date: Wed, 13 Feb 2013 09:26:05 -0500 Date: Wed, 13 Feb 2013 09:26:05 -0500
Subject: acpi/rt: Convert acpi_gbl_hardware lock back to a raw_spinlock_t Subject: acpi/rt: Convert acpi_gbl_hardware lock back to a raw_spinlock_t
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
We hit the following bug with 3.6-rt: We hit the following bug with 3.6-rt:

2
debian/patches/features/all/rt/arch-arm64-Add-lazy-preempt-support.patch vendored
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@ -1,7 +1,7 @@
From: Anders Roxell <anders.roxell@linaro.org> From: Anders Roxell <anders.roxell@linaro.org>
Date: Thu, 14 May 2015 17:52:17 +0200 Date: Thu, 14 May 2015 17:52:17 +0200
Subject: arch/arm64: Add lazy preempt support Subject: arch/arm64: Add lazy preempt support
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
arm64 is missing support for PREEMPT_RT. The main feature which is arm64 is missing support for PREEMPT_RT. The main feature which is
lacking is support for lazy preemption. The arch-specific entry code, lacking is support for lazy preemption. The arch-specific entry code,

2
debian/patches/features/all/rt/arm-at91-pit-remove-irq-handler-when-clock-is-unused.patch vendored
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@ -1,7 +1,7 @@
From: Benedikt Spranger <b.spranger@linutronix.de> From: Benedikt Spranger <b.spranger@linutronix.de>
Date: Sat, 6 Mar 2010 17:47:10 +0100 Date: Sat, 6 Mar 2010 17:47:10 +0100
Subject: ARM: AT91: PIT: Remove irq handler when clock event is unused Subject: ARM: AT91: PIT: Remove irq handler when clock event is unused
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Setup and remove the interrupt handler in clock event mode selection. Setup and remove the interrupt handler in clock event mode selection.
This avoids calling the (shared) interrupt handler when the device is This avoids calling the (shared) interrupt handler when the device is

2
debian/patches/features/all/rt/arm-at91-tclib-default-to-tclib-timer-for-rt.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Sat, 1 May 2010 18:29:35 +0200 Date: Sat, 1 May 2010 18:29:35 +0200
Subject: ARM: at91: tclib: Default to tclib timer for RT Subject: ARM: at91: tclib: Default to tclib timer for RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
RT is not too happy about the shared timer interrupt in AT91 RT is not too happy about the shared timer interrupt in AT91
devices. Default to tclib timer for RT. devices. Default to tclib timer for RT.

2
debian/patches/features/all/rt/arm-convert-boot-lock-to-raw.patch vendored
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@ -1,7 +1,7 @@
From: Frank Rowand <frank.rowand@am.sony.com> From: Frank Rowand <frank.rowand@am.sony.com>
Date: Mon, 19 Sep 2011 14:51:14 -0700 Date: Mon, 19 Sep 2011 14:51:14 -0700
Subject: arm: Convert arm boot_lock to raw Subject: arm: Convert arm boot_lock to raw
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The arm boot_lock is used by the secondary processor startup code. The locking 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. task is the idle thread, which has idle->sched_class == &idle_sched_class.

2
debian/patches/features/all/rt/arm-enable-highmem-for-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: arm: Enable highmem for rt Subject: arm: Enable highmem for rt
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 13 Feb 2013 11:03:11 +0100 Date: Wed, 13 Feb 2013 11:03:11 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
fixup highmem for ARM. fixup highmem for ARM.

2
debian/patches/features/all/rt/arm-highmem-flush-tlb-on-unmap.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 11 Mar 2013 21:37:27 +0100 Date: Mon, 11 Mar 2013 21:37:27 +0100
Subject: arm/highmem: Flush tlb on unmap Subject: arm/highmem: Flush tlb on unmap
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The tlb should be flushed on unmap and thus make the mapping entry 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 invalid. This is only done in the non-debug case which does not look

2
debian/patches/features/all/rt/arm-preempt-lazy-support.patch vendored
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@ -1,7 +1,7 @@
Subject: arm: Add support for lazy preemption Subject: arm: Add support for lazy preemption
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 31 Oct 2012 12:04:11 +0100 Date: Wed, 31 Oct 2012 12:04:11 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Implement the arm pieces for lazy preempt. Implement the arm pieces for lazy preempt.

2
debian/patches/features/all/rt/arm-unwind-use_raw_lock.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 20 Sep 2013 14:31:54 +0200 Date: Fri, 20 Sep 2013 14:31:54 +0200
Subject: arm/unwind: use a raw_spin_lock Subject: arm/unwind: use a raw_spin_lock
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Mostly unwind is done with irqs enabled however SLUB may call it with Mostly unwind is done with irqs enabled however SLUB may call it with
irqs disabled while creating a new SLUB cache. irqs disabled while creating a new SLUB cache.

2
debian/patches/features/all/rt/arm64-xen--Make-XEN-depend-on-non-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: arm64/xen: Make XEN depend on !RT Subject: arm64/xen: Make XEN depend on !RT
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 12 Oct 2015 11:18:40 +0200 Date: Mon, 12 Oct 2015 11:18:40 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
It's not ready and probably never will be, unless xen folks have a It's not ready and probably never will be, unless xen folks have a
look at it. look at it.

2
debian/patches/features/all/rt/ata-disable-interrupts-if-non-rt.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <srostedt@redhat.com> From: Steven Rostedt <srostedt@redhat.com>
Date: Fri, 3 Jul 2009 08:44:29 -0500 Date: Fri, 3 Jul 2009 08:44:29 -0500
Subject: ata: Do not disable interrupts in ide code for preempt-rt Subject: ata: Do not disable interrupts in ide code for preempt-rt
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Use the local_irq_*_nort variants. Use the local_irq_*_nort variants.

2
debian/patches/features/all/rt/blk-mq-revert-raw-locks-post-pone-notifier-to-POST_D.patchto-POST_D.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat, 3 May 2014 11:00:29 +0200 Date: Sat, 3 May 2014 11:00:29 +0200
Subject: blk-mq: revert raw locks, post pone notifier to POST_DEAD Subject: blk-mq: revert raw locks, post pone notifier to POST_DEAD
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The blk_mq_cpu_notify_lock should be raw because some CPU down levels The blk_mq_cpu_notify_lock should be raw because some CPU down levels
are called with interrupts off. The notifier itself calls currently one are called with interrupts off. The notifier itself calls currently one

8
debian/patches/features/all/rt/block-blk-mq-use-swait.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 13 Feb 2015 11:01:26 +0100 Date: Fri, 13 Feb 2015 11:01:26 +0100
Subject: block: blk-mq: Use swait Subject: block: blk-mq: Use swait
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
| BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:914 | 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 | in_atomic(): 1, irqs_disabled(): 0, pid: 255, name: kworker/u257:6
@ -46,7 +46,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
--- a/block/blk-core.c --- a/block/blk-core.c
+++ b/block/blk-core.c +++ b/block/blk-core.c
@@ -644,7 +644,7 @@ int blk_queue_enter(struct request_queue @@ -660,7 +660,7 @@ int blk_queue_enter(struct request_queue
if (!gfpflags_allow_blocking(gfp)) if (!gfpflags_allow_blocking(gfp))
return -EBUSY; return -EBUSY;
@ -55,7 +55,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
!atomic_read(&q->mq_freeze_depth) || !atomic_read(&q->mq_freeze_depth) ||
blk_queue_dying(q)); blk_queue_dying(q));
if (blk_queue_dying(q)) if (blk_queue_dying(q))
@@ -664,7 +664,7 @@ static void blk_queue_usage_counter_rele @@ -680,7 +680,7 @@ static void blk_queue_usage_counter_rele
struct request_queue *q = struct request_queue *q =
container_of(ref, struct request_queue, q_usage_counter); container_of(ref, struct request_queue, q_usage_counter);
@ -64,7 +64,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
} }
struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id) struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
@@ -726,7 +726,7 @@ struct request_queue *blk_alloc_queue_no @@ -742,7 +742,7 @@ struct request_queue *blk_alloc_queue_no
q->bypass_depth = 1; q->bypass_depth = 1;
__set_bit(QUEUE_FLAG_BYPASS, &q->queue_flags); __set_bit(QUEUE_FLAG_BYPASS, &q->queue_flags);

2
debian/patches/features/all/rt/block-mq-don-t-complete-requests-via-IPI.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 29 Jan 2015 15:10:08 +0100 Date: Thu, 29 Jan 2015 15:10:08 +0100
Subject: block/mq: don't complete requests via IPI Subject: block/mq: don't complete requests via IPI
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The IPI runs in hardirq context and there are sleeping locks. This patch The IPI runs in hardirq context and there are sleeping locks. This patch
moves the completion into a workqueue. moves the completion into a workqueue.

2
debian/patches/features/all/rt/block-mq-drop-per-ctx-cpu_lock.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 18 Feb 2015 18:37:26 +0100 Date: Wed, 18 Feb 2015 18:37:26 +0100
Subject: block/mq: drop per ctx cpu_lock Subject: block/mq: drop per ctx cpu_lock
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
While converting the get_cpu() to get_cpu_light() I added a cpu lock to While converting the get_cpu() to get_cpu_light() I added a cpu lock to
ensure the same code is not invoked twice on the same CPU. And now I run ensure the same code is not invoked twice on the same CPU. And now I run

2
debian/patches/features/all/rt/block-mq-drop-preempt-disable.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 14 Jul 2015 14:26:34 +0200 Date: Tue, 14 Jul 2015 14:26:34 +0200
Subject: block/mq: do not invoke preempt_disable() Subject: block/mq: do not invoke preempt_disable()
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
preempt_disable() and get_cpu() don't play well together with the sleeping preempt_disable() and get_cpu() don't play well together with the sleeping
locks it tries to allocate later. locks it tries to allocate later.

2
debian/patches/features/all/rt/block-mq-use-cpu_light.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 9 Apr 2014 10:37:23 +0200 Date: Wed, 9 Apr 2014 10:37:23 +0200
Subject: block: mq: use cpu_light() Subject: block: mq: use cpu_light()
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
there is a might sleep splat because get_cpu() disables preemption and 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() later we grab a lock. As a workaround for this we use get_cpu_light()

12
debian/patches/features/all/rt/block-shorten-interrupt-disabled-regions.patch vendored
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@ -1,7 +1,7 @@
Subject: block: Shorten interrupt disabled regions Subject: block: Shorten interrupt disabled regions
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 22 Jun 2011 19:47:02 +0200 Date: Wed, 22 Jun 2011 19:47:02 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Moving the blk_sched_flush_plug() call out of the interrupt/preempt Moving the blk_sched_flush_plug() call out of the interrupt/preempt
disabled region in the scheduler allows us to replace disabled region in the scheduler allows us to replace
@ -48,7 +48,7 @@ Link: http://lkml.kernel.org/r/20110622174919.025446432@linutronix.de
--- a/block/blk-core.c --- a/block/blk-core.c
+++ b/block/blk-core.c +++ b/block/blk-core.c
@@ -3182,7 +3182,7 @@ static void queue_unplugged(struct reque @@ -3198,7 +3198,7 @@ static void queue_unplugged(struct reque
blk_run_queue_async(q); blk_run_queue_async(q);
else else
__blk_run_queue(q); __blk_run_queue(q);
@ -57,7 +57,7 @@ Link: http://lkml.kernel.org/r/20110622174919.025446432@linutronix.de
} }
static void flush_plug_callbacks(struct blk_plug *plug, bool from_schedule) static void flush_plug_callbacks(struct blk_plug *plug, bool from_schedule)
@@ -3230,7 +3230,6 @@ EXPORT_SYMBOL(blk_check_plugged); @@ -3246,7 +3246,6 @@ EXPORT_SYMBOL(blk_check_plugged);
void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
{ {
struct request_queue *q; struct request_queue *q;
@ -65,7 +65,7 @@ Link: http://lkml.kernel.org/r/20110622174919.025446432@linutronix.de
struct request *rq; struct request *rq;
LIST_HEAD(list); LIST_HEAD(list);
unsigned int depth; unsigned int depth;
@@ -3250,11 +3249,6 @@ void blk_flush_plug_list(struct blk_plug @@ -3266,11 +3265,6 @@ void blk_flush_plug_list(struct blk_plug
q = NULL; q = NULL;
depth = 0; depth = 0;
@ -77,7 +77,7 @@ Link: http://lkml.kernel.org/r/20110622174919.025446432@linutronix.de
while (!list_empty(&list)) { while (!list_empty(&list)) {
rq = list_entry_rq(list.next); rq = list_entry_rq(list.next);
list_del_init(&rq->queuelist); list_del_init(&rq->queuelist);
@@ -3267,7 +3261,7 @@ void blk_flush_plug_list(struct blk_plug @@ -3283,7 +3277,7 @@ void blk_flush_plug_list(struct blk_plug
queue_unplugged(q, depth, from_schedule); queue_unplugged(q, depth, from_schedule);
q = rq->q; q = rq->q;
depth = 0; depth = 0;
@ -86,7 +86,7 @@ Link: http://lkml.kernel.org/r/20110622174919.025446432@linutronix.de
} }
/* /*
@@ -3294,8 +3288,6 @@ void blk_flush_plug_list(struct blk_plug @@ -3310,8 +3304,6 @@ void blk_flush_plug_list(struct blk_plug
*/ */
if (q) if (q)
queue_unplugged(q, depth, from_schedule); queue_unplugged(q, depth, from_schedule);

2
debian/patches/features/all/rt/block-use-cpu-chill.patch vendored
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@ -1,7 +1,7 @@
Subject: block: Use cpu_chill() for retry loops Subject: block: Use cpu_chill() for retry loops
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 20 Dec 2012 18:28:26 +0100 Date: Thu, 20 Dec 2012 18:28:26 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Retry loops on RT might loop forever when the modifying side was Retry loops on RT might loop forever when the modifying side was
preempted. Steven also observed a live lock when there was a preempted. Steven also observed a live lock when there was a

2
debian/patches/features/all/rt/bug-rt-dependend-variants.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu> From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:29:58 -0500 Date: Fri, 3 Jul 2009 08:29:58 -0500
Subject: bug: BUG_ON/WARN_ON variants dependend on RT/!RT Subject: bug: BUG_ON/WARN_ON variants dependend on RT/!RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Introduce RT/NON-RT WARN/BUG statements to avoid ifdefs in the code. Introduce RT/NON-RT WARN/BUG statements to avoid ifdefs in the code.

4
debian/patches/features/all/rt/cgroups-scheduling-while-atomic-in-cgroup-code.patch vendored
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@ -1,7 +1,7 @@
From: Mike Galbraith <umgwanakikbuti@gmail.com> From: Mike Galbraith <umgwanakikbuti@gmail.com>
Date: Sat, 21 Jun 2014 10:09:48 +0200 Date: Sat, 21 Jun 2014 10:09:48 +0200
Subject: memcontrol: Prevent scheduling while atomic in cgroup code Subject: memcontrol: Prevent scheduling while atomic in cgroup code
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
mm, memcg: make refill_stock() use get_cpu_light() mm, memcg: make refill_stock() use get_cpu_light()
@ -43,7 +43,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
--- a/mm/memcontrol.c --- a/mm/memcontrol.c
+++ b/mm/memcontrol.c +++ b/mm/memcontrol.c
@@ -1913,14 +1913,17 @@ static void drain_local_stock(struct wor @@ -1937,14 +1937,17 @@ static void drain_local_stock(struct wor
*/ */
static void refill_stock(struct mem_cgroup *memcg, unsigned int nr_pages) static void refill_stock(struct mem_cgroup *memcg, unsigned int nr_pages)
{ {

2
debian/patches/features/all/rt/cgroups-use-simple-wait-in-css_release.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 13 Feb 2015 15:52:24 +0100 Date: Fri, 13 Feb 2015 15:52:24 +0100
Subject: cgroups: use simple wait in css_release() Subject: cgroups: use simple wait in css_release()
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
To avoid: To avoid:
|BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:914 |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:914

2
debian/patches/features/all/rt/clocksource-tclib-allow-higher-clockrates.patch vendored
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@ -1,7 +1,7 @@
From: Benedikt Spranger <b.spranger@linutronix.de> From: Benedikt Spranger <b.spranger@linutronix.de>
Date: Mon, 8 Mar 2010 18:57:04 +0100 Date: Mon, 8 Mar 2010 18:57:04 +0100
Subject: clocksource: TCLIB: Allow higher clock rates for clock events Subject: clocksource: TCLIB: Allow higher clock rates for clock events
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
As default the TCLIB uses the 32KiHz base clock rate for clock events. As default the TCLIB uses the 32KiHz base clock rate for clock events.
Add a compile time selection to allow higher clock resulution. Add a compile time selection to allow higher clock resulution.

2
debian/patches/features/all/rt/completion-use-simple-wait-queues.patch vendored
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@ -1,7 +1,7 @@
Subject: completion: Use simple wait queues Subject: completion: Use simple wait queues
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 11 Jan 2013 11:23:51 +0100 Date: Fri, 11 Jan 2013 11:23:51 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Completions have no long lasting callbacks and therefor do not need Completions have no long lasting callbacks and therefor do not need
the complex waitqueue variant. Use simple waitqueues which reduces the the complex waitqueue variant. Use simple waitqueues which reduces the

2
debian/patches/features/all/rt/cond-resched-lock-rt-tweak.patch vendored
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@ -1,7 +1,7 @@
Subject: sched: Use the proper LOCK_OFFSET for cond_resched() Subject: sched: Use the proper LOCK_OFFSET for cond_resched()
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 17 Jul 2011 22:51:33 +0200 Date: Sun, 17 Jul 2011 22:51:33 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
RT does not increment preempt count when a 'sleeping' spinlock is RT does not increment preempt count when a 'sleeping' spinlock is
locked. Update PREEMPT_LOCK_OFFSET for that case. locked. Update PREEMPT_LOCK_OFFSET for that case.

4
debian/patches/features/all/rt/cond-resched-softirq-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: sched: Take RT softirq semantics into account in cond_resched() Subject: sched: Take RT softirq semantics into account in cond_resched()
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Jul 2011 09:56:44 +0200 Date: Thu, 14 Jul 2011 09:56:44 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The softirq semantics work different on -RT. There is no SOFTIRQ_MASK in The softirq semantics work different on -RT. There is no SOFTIRQ_MASK in
the preemption counter which leads to the BUG_ON() statement in the preemption counter which leads to the BUG_ON() statement in
@ -16,7 +16,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
--- a/include/linux/sched.h --- a/include/linux/sched.h
+++ b/include/linux/sched.h +++ b/include/linux/sched.h
@@ -2984,12 +2984,16 @@ extern int __cond_resched_lock(spinlock_ @@ -2986,12 +2986,16 @@ extern int __cond_resched_lock(spinlock_
__cond_resched_lock(lock); \ __cond_resched_lock(lock); \
}) })

2
debian/patches/features/all/rt/cpu-hotplug-Document-why-PREEMPT_RT-uses-a-spinlock.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org> From: Steven Rostedt <rostedt@goodmis.org>
Date: Thu, 5 Dec 2013 09:16:52 -0500 Date: Thu, 5 Dec 2013 09:16:52 -0500
Subject: cpu hotplug: Document why PREEMPT_RT uses a spinlock Subject: cpu hotplug: Document why PREEMPT_RT uses a spinlock
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The patch: The patch:

2
debian/patches/features/all/rt/cpu-rt-make-hotplug-lock-a-sleeping-spinlock-on-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: cpu: Make hotplug.lock a "sleeping" spinlock on RT Subject: cpu: Make hotplug.lock a "sleeping" spinlock on RT
From: Steven Rostedt <rostedt@goodmis.org> From: Steven Rostedt <rostedt@goodmis.org>
Date: Fri, 02 Mar 2012 10:36:57 -0500 Date: Fri, 02 Mar 2012 10:36:57 -0500
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Tasks can block on hotplug.lock in pin_current_cpu(), but their state Tasks can block on hotplug.lock in pin_current_cpu(), but their state
might be != RUNNING. So the mutex wakeup will set the state might be != RUNNING. So the mutex wakeup will set the state

6
debian/patches/features/all/rt/cpu-rt-rework-cpu-down.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <srostedt@redhat.com> From: Steven Rostedt <srostedt@redhat.com>
Date: Mon, 16 Jul 2012 08:07:43 +0000 Date: Mon, 16 Jul 2012 08:07:43 +0000
Subject: cpu/rt: Rework cpu down for PREEMPT_RT Subject: cpu/rt: Rework cpu down for PREEMPT_RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Bringing a CPU down is a pain with the PREEMPT_RT kernel because Bringing a CPU down is a pain with the PREEMPT_RT kernel because
tasks can be preempted in many more places than in non-RT. In tasks can be preempted in many more places than in non-RT. In
@ -57,7 +57,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
--- a/include/linux/sched.h --- a/include/linux/sched.h
+++ b/include/linux/sched.h +++ b/include/linux/sched.h
@@ -2282,6 +2282,10 @@ extern void do_set_cpus_allowed(struct t @@ -2284,6 +2284,10 @@ extern void do_set_cpus_allowed(struct t
extern int set_cpus_allowed_ptr(struct task_struct *p, extern int set_cpus_allowed_ptr(struct task_struct *p,
const struct cpumask *new_mask); const struct cpumask *new_mask);
@ -68,7 +68,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
#else #else
static inline void do_set_cpus_allowed(struct task_struct *p, static inline void do_set_cpus_allowed(struct task_struct *p,
const struct cpumask *new_mask) const struct cpumask *new_mask)
@@ -2294,6 +2298,9 @@ static inline int set_cpus_allowed_ptr(s @@ -2296,6 +2300,9 @@ static inline int set_cpus_allowed_ptr(s
return -EINVAL; return -EINVAL;
return 0; return 0;
} }

2
debian/patches/features/all/rt/cpu_chill-Add-a-UNINTERRUPTIBLE-hrtimer_nanosleep.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org> From: Steven Rostedt <rostedt@goodmis.org>
Date: Tue, 4 Mar 2014 12:28:32 -0500 Date: Tue, 4 Mar 2014 12:28:32 -0500
Subject: cpu_chill: Add a UNINTERRUPTIBLE hrtimer_nanosleep Subject: cpu_chill: Add a UNINTERRUPTIBLE hrtimer_nanosleep
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
We hit another bug that was caused by switching cpu_chill() from We hit another bug that was caused by switching cpu_chill() from
msleep() to hrtimer_nanosleep(). msleep() to hrtimer_nanosleep().

2
debian/patches/features/all/rt/cpu_down_move_migrate_enable_back.patch vendored
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@ -1,7 +1,7 @@
From: Tiejun Chen <tiejun.chen@windriver.com> From: Tiejun Chen <tiejun.chen@windriver.com>
Subject: cpu_down: move migrate_enable() back Subject: cpu_down: move migrate_enable() back
Date: Thu, 7 Nov 2013 10:06:07 +0800 Date: Thu, 7 Nov 2013 10:06:07 +0800
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Commit 08c1ab68, "hotplug-use-migrate-disable.patch", intends to Commit 08c1ab68, "hotplug-use-migrate-disable.patch", intends to
use migrate_enable()/migrate_disable() to replace that combination use migrate_enable()/migrate_disable() to replace that combination

2
debian/patches/features/all/rt/cpufreq-drop-K8-s-driver-from-beeing-selected.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 9 Apr 2015 15:23:01 +0200 Date: Thu, 9 Apr 2015 15:23:01 +0200
Subject: cpufreq: drop K8's driver from beeing selected Subject: cpufreq: drop K8's driver from beeing selected
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Ralf posted a picture of a backtrace from Ralf posted a picture of a backtrace from

2
debian/patches/features/all/rt/cpumask-disable-offstack-on-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT Subject: cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 14 Dec 2011 01:03:49 +0100 Date: Wed, 14 Dec 2011 01:03:49 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
We can't deal with the cpumask allocations which happen in atomic We can't deal with the cpumask allocations which happen in atomic
context (see arch/x86/kernel/apic/io_apic.c) on RT right now. context (see arch/x86/kernel/apic/io_apic.c) on RT right now.

2
debian/patches/features/all/rt/crypto-Reduce-preempt-disabled-regions-more-algos.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 21 Feb 2014 17:24:04 +0100 Date: Fri, 21 Feb 2014 17:24:04 +0100
Subject: crypto: Reduce preempt disabled regions, more algos Subject: crypto: Reduce preempt disabled regions, more algos
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Don Estabrook reported Don Estabrook reported
| kernel: WARNING: CPU: 2 PID: 858 at kernel/sched/core.c:2428 migrate_disable+0xed/0x100() | kernel: WARNING: CPU: 2 PID: 858 at kernel/sched/core.c:2428 migrate_disable+0xed/0x100()

2
debian/patches/features/all/rt/debugobjects-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: debugobjects: Make RT aware Subject: debugobjects: Make RT aware
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 17 Jul 2011 21:41:35 +0200 Date: Sun, 17 Jul 2011 21:41:35 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Avoid filling the pool / allocating memory with irqs off(). Avoid filling the pool / allocating memory with irqs off().

2
debian/patches/features/all/rt/dm-make-rt-aware.patch vendored
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@ -1,7 +1,7 @@
Subject: dm: Make rt aware Subject: dm: Make rt aware
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 14 Nov 2011 23:06:09 +0100 Date: Mon, 14 Nov 2011 23:06:09 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Use the BUG_ON_NORT variant for the irq_disabled() checks. RT has Use the BUG_ON_NORT variant for the irq_disabled() checks. RT has
interrupts legitimately enabled here as we cant deadlock against the interrupts legitimately enabled here as we cant deadlock against the

2
debian/patches/features/all/rt/drivers-net-8139-disable-irq-nosync.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu> From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:29:24 -0500 Date: Fri, 3 Jul 2009 08:29:24 -0500
Subject: drivers/net: Use disable_irq_nosync() in 8139too Subject: drivers/net: Use disable_irq_nosync() in 8139too
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Use disable_irq_nosync() instead of disable_irq() as this might be Use disable_irq_nosync() instead of disable_irq() as this might be
called in atomic context with netpoll. called in atomic context with netpoll.

2
debian/patches/features/all/rt/drivers-net-fix-livelock-issues.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Sat, 20 Jun 2009 11:36:54 +0200 Date: Sat, 20 Jun 2009 11:36:54 +0200
Subject: drivers/net: fix livelock issues Subject: drivers/net: fix livelock issues
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Preempt-RT runs into a live lock issue with the NETDEV_TX_LOCKED micro Preempt-RT runs into a live lock issue with the NETDEV_TX_LOCKED micro
optimization. The reason is that the softirq thread is rescheduling optimization. The reason is that the softirq thread is rescheduling

2
debian/patches/features/all/rt/drivers-net-vortex-fix-locking-issues.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org> From: Steven Rostedt <rostedt@goodmis.org>
Date: Fri, 3 Jul 2009 08:30:00 -0500 Date: Fri, 3 Jul 2009 08:30:00 -0500
Subject: drivers/net: vortex fix locking issues Subject: drivers/net: vortex fix locking issues
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Argh, cut and paste wasn't enough... Argh, cut and paste wasn't enough...

2
debian/patches/features/all/rt/drivers-random-reduce-preempt-disabled-region.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu> From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:29:30 -0500 Date: Fri, 3 Jul 2009 08:29:30 -0500
Subject: drivers: random: Reduce preempt disabled region Subject: drivers: random: Reduce preempt disabled region
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
No need to keep preemption disabled across the whole function. No need to keep preemption disabled across the whole function.

2
debian/patches/features/all/rt/drivers-tty-fix-omap-lock-crap.patch vendored
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@ -1,7 +1,7 @@
Subject: tty/serial/omap: Make the locking RT aware Subject: tty/serial/omap: Make the locking RT aware
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 28 Jul 2011 13:32:57 +0200 Date: Thu, 28 Jul 2011 13:32:57 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The lock is a sleeping lock and local_irq_save() is not the 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 optimsation we are looking for. Redo it to make it work on -RT and

2
debian/patches/features/all/rt/drivers-tty-pl011-irq-disable-madness.patch vendored
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@ -1,7 +1,7 @@
Subject: tty/serial/pl011: Make the locking work on RT Subject: tty/serial/pl011: Make the locking work on RT
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 08 Jan 2013 21:36:51 +0100 Date: Tue, 08 Jan 2013 21:36:51 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The lock is a sleeping lock and local_irq_save() is not the optimsation 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. we are looking for. Redo it to make it work on -RT and non-RT.

2
debian/patches/features/all/rt/drm-i915-drop-trace_i915_gem_ring_dispatch-onrt.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 25 Apr 2013 18:12:52 +0200 Date: Thu, 25 Apr 2013 18:12:52 +0200
Subject: drm/i915: drop trace_i915_gem_ring_dispatch on rt Subject: drm/i915: drop trace_i915_gem_ring_dispatch on rt
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
This tracepoint is responsible for: This tracepoint is responsible for:

2
debian/patches/features/all/rt/dump-stack-don-t-disable-preemption-during-trace.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sun, 16 Aug 2015 14:27:50 +0200 Date: Sun, 16 Aug 2015 14:27:50 +0200
Subject: dump stack: don't disable preemption during trace Subject: dump stack: don't disable preemption during trace
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
I see here large latencies during a stack dump on x86. The I see here large latencies during a stack dump on x86. The
preempt_disable() and get_cpu() should forbid moving the task to another preempt_disable() and get_cpu() should forbid moving the task to another

2
debian/patches/features/all/rt/epoll-use-get-cpu-light.patch vendored
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@ -1,7 +1,7 @@
Subject: fs/epoll: Do not disable preemption on RT Subject: fs/epoll: Do not disable preemption on RT
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 08 Jul 2011 16:35:35 +0200 Date: Fri, 08 Jul 2011 16:35:35 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
ep_call_nested() takes a sleeping lock so we can't disable preemption. 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 The light version is enough since ep_call_nested() doesn't mind beeing

2
debian/patches/features/all/rt/fs-aio-simple-simple-work.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 16 Feb 2015 18:49:10 +0100 Date: Mon, 16 Feb 2015 18:49:10 +0100
Subject: fs/aio: simple simple work Subject: fs/aio: simple simple work
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
|BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:768 |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:768
|in_atomic(): 1, irqs_disabled(): 0, pid: 26, name: rcuos/2 |in_atomic(): 1, irqs_disabled(): 0, pid: 26, name: rcuos/2

4
debian/patches/features/all/rt/fs-block-rt-support.patch vendored
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@ -1,7 +1,7 @@
Subject: block: Turn off warning which is bogus on RT Subject: block: Turn off warning which is bogus on RT
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 14 Jun 2011 17:05:09 +0200 Date: Tue, 14 Jun 2011 17:05:09 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
On -RT the context is always with IRQs enabled. Ignore this warning on -RT. On -RT the context is always with IRQs enabled. Ignore this warning on -RT.
@ -12,7 +12,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
--- a/block/blk-core.c --- a/block/blk-core.c
+++ b/block/blk-core.c +++ b/block/blk-core.c
@@ -217,7 +217,7 @@ EXPORT_SYMBOL(blk_delay_queue); @@ -233,7 +233,7 @@ EXPORT_SYMBOL(blk_start_queue_async);
**/ **/
void blk_start_queue(struct request_queue *q) void blk_start_queue(struct request_queue *q)
{ {

2
debian/patches/features/all/rt/fs-dcache-use-cpu-chill-in-trylock-loops.patch vendored
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@ -1,7 +1,7 @@
Subject: fs: dcache: Use cpu_chill() in trylock loops Subject: fs: dcache: Use cpu_chill() in trylock loops
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 07 Mar 2012 21:00:34 +0100 Date: Wed, 07 Mar 2012 21:00:34 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Retry loops on RT might loop forever when the modifying side was Retry loops on RT might loop forever when the modifying side was
preempted. Use cpu_chill() instead of cpu_relax() to let the system preempted. Use cpu_chill() instead of cpu_relax() to let the system

2
debian/patches/features/all/rt/fs-jbd-replace-bh_state-lock.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 18 Mar 2011 10:11:25 +0100 Date: Fri, 18 Mar 2011 10:11:25 +0100
Subject: fs: jbd/jbd2: Make state lock and journal head lock rt safe Subject: fs: jbd/jbd2: Make state lock and journal head lock rt safe
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
bit_spin_locks break under RT. bit_spin_locks break under RT.

2
debian/patches/features/all/rt/fs-jbd2-pull-your-plug-when-waiting-for-space.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 17 Feb 2014 17:30:03 +0100 Date: Mon, 17 Feb 2014 17:30:03 +0100
Subject: fs: jbd2: pull your plug when waiting for space Subject: fs: jbd2: pull your plug when waiting for space
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Two cps in parallel managed to stall the the ext4 fs. It seems that Two cps in parallel managed to stall the the ext4 fs. It seems that
journal code is either waiting for locks or sleeping waiting for journal code is either waiting for locks or sleeping waiting for

2
debian/patches/features/all/rt/fs-namespace-preemption-fix.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 19 Jul 2009 08:44:27 -0500 Date: Sun, 19 Jul 2009 08:44:27 -0500
Subject: fs: namespace preemption fix Subject: fs: namespace preemption fix
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
On RT we cannot loop with preemption disabled here as On RT we cannot loop with preemption disabled here as
mnt_make_readonly() might have been preempted. We can safely enable mnt_make_readonly() might have been preempted. We can safely enable

2
debian/patches/features/all/rt/fs-ntfs-disable-interrupt-non-rt.patch vendored
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@ -1,7 +1,7 @@
From: Mike Galbraith <efault@gmx.de> From: Mike Galbraith <efault@gmx.de>
Date: Fri, 3 Jul 2009 08:44:12 -0500 Date: Fri, 3 Jul 2009 08:44:12 -0500
Subject: fs: ntfs: disable interrupt only on !RT Subject: fs: ntfs: disable interrupt only on !RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
On Sat, 2007-10-27 at 11:44 +0200, Ingo Molnar wrote: On Sat, 2007-10-27 at 11:44 +0200, Ingo Molnar wrote:
> * Nick Piggin <nickpiggin@yahoo.com.au> wrote: > * Nick Piggin <nickpiggin@yahoo.com.au> wrote:

2
debian/patches/features/all/rt/fs-replace-bh_uptodate_lock-for-rt.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 18 Mar 2011 09:18:52 +0100 Date: Fri, 18 Mar 2011 09:18:52 +0100
Subject: buffer_head: Replace bh_uptodate_lock for -rt Subject: buffer_head: Replace bh_uptodate_lock for -rt
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Wrap the bit_spin_lock calls into a separate inline and add the RT Wrap the bit_spin_lock calls into a separate inline and add the RT
replacements with a real spinlock. replacements with a real spinlock.

2
debian/patches/features/all/rt/ftrace-migrate-disable-tracing.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 17 Jul 2011 21:56:42 +0200 Date: Sun, 17 Jul 2011 21:56:42 +0200
Subject: trace: Add migrate-disabled counter to tracing output Subject: trace: Add migrate-disabled counter to tracing output
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
--- ---

2
debian/patches/features/all/rt/futex-requeue-pi-fix.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org> From: Steven Rostedt <rostedt@goodmis.org>
Date: Tue, 14 Jul 2015 14:26:34 +0200 Date: Tue, 14 Jul 2015 14:26:34 +0200
Subject: futex: Fix bug on when a requeued RT task times out Subject: futex: Fix bug on when a requeued RT task times out
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Requeue with timeout causes a bug with PREEMPT_RT_FULL. Requeue with timeout causes a bug with PREEMPT_RT_FULL.

2
debian/patches/features/all/rt/genirq-disable-irqpoll-on-rt.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu> From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:29:57 -0500 Date: Fri, 3 Jul 2009 08:29:57 -0500
Subject: genirq: Disable irqpoll on -rt Subject: genirq: Disable irqpoll on -rt
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Creates long latencies for no value Creates long latencies for no value

2
debian/patches/features/all/rt/genirq-do-not-invoke-the-affinity-callback-via-a-wor.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 21 Aug 2013 17:48:46 +0200 Date: Wed, 21 Aug 2013 17:48:46 +0200
Subject: genirq: Do not invoke the affinity callback via a workqueue on RT Subject: genirq: Do not invoke the affinity callback via a workqueue on RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Joe Korty reported, that __irq_set_affinity_locked() schedules a Joe Korty reported, that __irq_set_affinity_locked() schedules a
workqueue while holding a rawlock which results in a might_sleep() workqueue while holding a rawlock which results in a might_sleep()

2
debian/patches/features/all/rt/genirq-force-threading.patch vendored
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@ -1,7 +1,7 @@
Subject: genirq: Force interrupt thread on RT Subject: genirq: Force interrupt thread on RT
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 03 Apr 2011 11:57:29 +0200 Date: Sun, 03 Apr 2011 11:57:29 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Force threaded_irqs and optimize the code (force_irqthreads) in regard Force threaded_irqs and optimize the code (force_irqthreads) in regard
to this. to this.

2
debian/patches/features/all/rt/hotplug-Use-set_cpus_allowed_ptr-in-sync_unplug_thre.patch vendored
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@ -1,7 +1,7 @@
From: Mike Galbraith <umgwanakikbuti@gmail.com> From: Mike Galbraith <umgwanakikbuti@gmail.com>
Date: Tue, 24 Mar 2015 08:14:49 +0100 Date: Tue, 24 Mar 2015 08:14:49 +0100
Subject: hotplug: Use set_cpus_allowed_ptr() in sync_unplug_thread() Subject: hotplug: Use set_cpus_allowed_ptr() in sync_unplug_thread()
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
do_set_cpus_allowed() is not safe vs ->sched_class change. do_set_cpus_allowed() is not safe vs ->sched_class change.

2
debian/patches/features/all/rt/hotplug-light-get-online-cpus.patch vendored
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@ -1,7 +1,7 @@
Subject: hotplug: Lightweight get online cpus Subject: hotplug: Lightweight get online cpus
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 15 Jun 2011 12:36:06 +0200 Date: Wed, 15 Jun 2011 12:36:06 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
get_online_cpus() is a heavy weight function which involves a global get_online_cpus() is a heavy weight function which involves a global
mutex. migrate_disable() wants a simpler construct which prevents only mutex. migrate_disable() wants a simpler construct which prevents only

2
debian/patches/features/all/rt/hotplug-sync_unplug-no-27-5cn-27-in-task-name.patch vendored
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@ -1,7 +1,7 @@
Subject: hotplug: sync_unplug: No "\n" in task name Subject: hotplug: sync_unplug: No "\n" in task name
From: Yong Zhang <yong.zhang0@gmail.com> From: Yong Zhang <yong.zhang0@gmail.com>
Date: Sun, 16 Oct 2011 18:56:43 +0800 Date: Sun, 16 Oct 2011 18:56:43 +0800
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Otherwise the output will look a little odd. Otherwise the output will look a little odd.

2
debian/patches/features/all/rt/hotplug-use-migrate-disable.patch vendored
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@ -1,7 +1,7 @@
Subject: hotplug: Use migrate disable on unplug Subject: hotplug: Use migrate disable on unplug
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 17 Jul 2011 19:35:29 +0200 Date: Sun, 17 Jul 2011 19:35:29 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Migration needs to be disabled accross the unplug handling to make Migration needs to be disabled accross the unplug handling to make
sure that the unplug thread is off the unplugged cpu. sure that the unplug thread is off the unplugged cpu.

2
debian/patches/features/all/rt/hrtimer-Move-schedule_work-call-to-helper-thread.patch vendored
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@ -1,7 +1,7 @@
From: Yang Shi <yang.shi@windriver.com> From: Yang Shi <yang.shi@windriver.com>
Date: Mon, 16 Sep 2013 14:09:19 -0700 Date: Mon, 16 Sep 2013 14:09:19 -0700
Subject: hrtimer: Move schedule_work call to helper thread Subject: hrtimer: Move schedule_work call to helper thread
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
When run ltp leapsec_timer test, the following call trace is caught: When run ltp leapsec_timer test, the following call trace is caught:

2
debian/patches/features/all/rt/hrtimer-enfore-64byte-alignment.patch vendored
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@ -2,7 +2,7 @@ From e35e67cb032e78055b63eae5a3a370664fabfc01 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 23 Dec 2015 20:57:41 +0100 Date: Wed, 23 Dec 2015 20:57:41 +0100
Subject: [PATCH] hrtimer: enfore 64byte alignment Subject: [PATCH] hrtimer: enfore 64byte alignment
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The patch "hrtimer: Fixup hrtimer callback changes for preempt-rt" adds The patch "hrtimer: Fixup hrtimer callback changes for preempt-rt" adds
a list_head expired to struct hrtimer_clock_base and with it we run into a list_head expired to struct hrtimer_clock_base and with it we run into

2
debian/patches/features/all/rt/hrtimer-fixup-hrtimer-callback-changes-for-preempt-r.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 3 Jul 2009 08:44:31 -0500 Date: Fri, 3 Jul 2009 08:44:31 -0500
Subject: hrtimer: Fixup hrtimer callback changes for preempt-rt Subject: hrtimer: Fixup hrtimer callback changes for preempt-rt
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
In preempt-rt we can not call the callbacks which take sleeping locks In preempt-rt we can not call the callbacks which take sleeping locks
from the timer interrupt context. from the timer interrupt context.

2
debian/patches/features/all/rt/hrtimers-prepare-full-preemption.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu> From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:29:34 -0500 Date: Fri, 3 Jul 2009 08:29:34 -0500
Subject: hrtimers: Prepare full preemption Subject: hrtimers: Prepare full preemption
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Make cancellation of a running callback in softirq context safe Make cancellation of a running callback in softirq context safe
against preemption. against preemption.

2
debian/patches/features/all/rt/hwlat-detector-Don-t-ignore-threshold-module-paramet.patch vendored
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@ -1,7 +1,7 @@
From: Mike Galbraith <bitbucket@online.de> From: Mike Galbraith <bitbucket@online.de>
Date: Fri, 30 Aug 2013 07:57:25 +0200 Date: Fri, 30 Aug 2013 07:57:25 +0200
Subject: hwlat-detector: Don't ignore threshold module parameter Subject: hwlat-detector: Don't ignore threshold module parameter
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
If the user specified a threshold at module load time, use it. If the user specified a threshold at module load time, use it.

2
debian/patches/features/all/rt/hwlat-detector-Update-hwlat_detector-to-add-outer-lo.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org> From: Steven Rostedt <rostedt@goodmis.org>
Date: Mon, 19 Aug 2013 17:33:25 -0400 Date: Mon, 19 Aug 2013 17:33:25 -0400
Subject: hwlat-detector: Update hwlat_detector to add outer loop detection Subject: hwlat-detector: Update hwlat_detector to add outer loop detection
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The hwlat_detector reads two timestamps in a row, then reports any The hwlat_detector reads two timestamps in a row, then reports any
gap between those calls. The problem is, it misses everything between gap between those calls. The problem is, it misses everything between

2
debian/patches/features/all/rt/hwlat-detector-Use-thread-instead-of-stop-machine.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org> From: Steven Rostedt <rostedt@goodmis.org>
Date: Mon, 19 Aug 2013 17:33:27 -0400 Date: Mon, 19 Aug 2013 17:33:27 -0400
Subject: hwlat-detector: Use thread instead of stop machine Subject: hwlat-detector: Use thread instead of stop machine
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
There's no reason to use stop machine to search for hardware latency. There's no reason to use stop machine to search for hardware latency.
Simply disabling interrupts while running the loop will do enough to Simply disabling interrupts while running the loop will do enough to

2
debian/patches/features/all/rt/hwlat-detector-Use-trace_clock_local-if-available.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org> From: Steven Rostedt <rostedt@goodmis.org>
Date: Mon, 19 Aug 2013 17:33:26 -0400 Date: Mon, 19 Aug 2013 17:33:26 -0400
Subject: hwlat-detector: Use trace_clock_local if available Subject: hwlat-detector: Use trace_clock_local if available
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
As ktime_get() calls into the timing code which does a read_seq(), it As ktime_get() calls into the timing code which does a read_seq(), it
may be affected by other CPUS that touch that lock. To remove this may be affected by other CPUS that touch that lock. To remove this

2
debian/patches/features/all/rt/hwlatdetect.patch vendored
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@ -1,7 +1,7 @@
Subject: hwlatdetect.patch Subject: hwlatdetect.patch
From: Carsten Emde <C.Emde@osadl.org> From: Carsten Emde <C.Emde@osadl.org>
Date: Tue, 19 Jul 2011 13:53:12 +0100 Date: Tue, 19 Jul 2011 13:53:12 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Jon Masters developed this wonderful SMI detector. For details please Jon Masters developed this wonderful SMI detector. For details please
consult Documentation/hwlat_detector.txt. It could be ported to Linux consult Documentation/hwlat_detector.txt. It could be ported to Linux

2
debian/patches/features/all/rt/i2c-omap-drop-the-lock-hard-irq-context.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 21 Mar 2013 11:35:49 +0100 Date: Thu, 21 Mar 2013 11:35:49 +0100
Subject: i2c/omap: drop the lock hard irq context Subject: i2c/omap: drop the lock hard irq context
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The lock is taken while reading two registers. On RT the first lock is The lock is taken while reading two registers. On RT the first lock is
taken in hard irq where it might sleep and in the threaded irq. taken in hard irq where it might sleep and in the threaded irq.

4
debian/patches/features/all/rt/i915-bogus-warning-from-i915-when-running-on-PREEMPT.patch vendored
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@ -1,7 +1,7 @@
From: Clark Williams <williams@redhat.com> From: Clark Williams <williams@redhat.com>
Date: Tue, 26 May 2015 10:43:43 -0500 Date: Tue, 26 May 2015 10:43:43 -0500
Subject: i915: bogus warning from i915 when running on PREEMPT_RT Subject: i915: bogus warning from i915 when running on PREEMPT_RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The i915 driver has a 'WARN_ON(!in_interrupt())' in the display The i915 driver has a 'WARN_ON(!in_interrupt())' in the display
handler, which whines constanly on the RT kernel (since the interrupt handler, which whines constanly on the RT kernel (since the interrupt
@ -19,7 +19,7 @@ Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
--- a/drivers/gpu/drm/i915/intel_display.c --- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11366,7 +11366,7 @@ void intel_check_page_flip(struct drm_de @@ -11376,7 +11376,7 @@ void intel_check_page_flip(struct drm_de
struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_unpin_work *work; struct intel_unpin_work *work;

2
debian/patches/features/all/rt/i915_compile_fix.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 14 Jul 2015 14:26:34 +0200 Date: Tue, 14 Jul 2015 14:26:34 +0200
Subject: gpu/i915: don't open code these things Subject: gpu/i915: don't open code these things
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The opencode part is gone in 1f83fee0 ("drm/i915: clear up wedged transitions") The opencode part is gone in 1f83fee0 ("drm/i915: clear up wedged transitions")
the owner check is still there. the owner check is still there.

2
debian/patches/features/all/rt/ide-use-nort-local-irq-variants.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu> From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:30:16 -0500 Date: Fri, 3 Jul 2009 08:30:16 -0500
Subject: ide: Do not disable interrupts for PREEMPT-RT Subject: ide: Do not disable interrupts for PREEMPT-RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Use the local_irq_*_nort variants. Use the local_irq_*_nort variants.

2
debian/patches/features/all/rt/idr-use-local-lock-for-protection.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 14 Jul 2015 14:26:34 +0200 Date: Tue, 14 Jul 2015 14:26:34 +0200
Subject: idr: Use local lock instead of preempt enable/disable Subject: idr: Use local lock instead of preempt enable/disable
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
We need to protect the per cpu variable and prevent migration. We need to protect the per cpu variable and prevent migration.

2
debian/patches/features/all/rt/infiniband-mellanox-ib-use-nort-irq.patch vendored
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@ -1,7 +1,7 @@
From: Sven-Thorsten Dietrich <sdietrich@novell.com> From: Sven-Thorsten Dietrich <sdietrich@novell.com>
Date: Fri, 3 Jul 2009 08:30:35 -0500 Date: Fri, 3 Jul 2009 08:30:35 -0500
Subject: infiniband: Mellanox IB driver patch use _nort() primitives Subject: infiniband: Mellanox IB driver patch use _nort() primitives
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Fixes in_atomic stack-dump, when Mellanox module is loaded into the RT Fixes in_atomic stack-dump, when Mellanox module is loaded into the RT
Kernel. Kernel.

2
debian/patches/features/all/rt/inpt-gameport-use-local-irq-nort.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu> From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:30:16 -0500 Date: Fri, 3 Jul 2009 08:30:16 -0500
Subject: input: gameport: Do not disable interrupts on PREEMPT_RT Subject: input: gameport: Do not disable interrupts on PREEMPT_RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Use the _nort() primitives. Use the _nort() primitives.

6
debian/patches/features/all/rt/introduce_migrate_disable_cpu_light.patch vendored
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@ -1,7 +1,7 @@
Subject: Intrduce migrate_disable() + cpu_light() Subject: Intrduce migrate_disable() + cpu_light()
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 17 Jun 2011 15:42:38 +0200 Date: Fri, 17 Jun 2011 15:42:38 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Introduce migrate_disable(). The task can't be pushed to another CPU but can Introduce migrate_disable(). The task can't be pushed to another CPU but can
be preempted. be preempted.
@ -90,7 +90,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
int nr_cpus_allowed; int nr_cpus_allowed;
cpumask_t cpus_allowed; cpumask_t cpus_allowed;
@@ -1836,9 +1842,6 @@ extern int arch_task_struct_size __read_ @@ -1837,9 +1843,6 @@ extern int arch_task_struct_size __read_
# define arch_task_struct_size (sizeof(struct task_struct)) # define arch_task_struct_size (sizeof(struct task_struct))
#endif #endif
@ -100,7 +100,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
#define TNF_MIGRATED 0x01 #define TNF_MIGRATED 0x01
#define TNF_NO_GROUP 0x02 #define TNF_NO_GROUP 0x02
#define TNF_SHARED 0x04 #define TNF_SHARED 0x04
@@ -3114,6 +3117,26 @@ static inline void set_task_cpu(struct t @@ -3116,6 +3119,26 @@ static inline void set_task_cpu(struct t
#endif /* CONFIG_SMP */ #endif /* CONFIG_SMP */

2
debian/patches/features/all/rt/ipc-msg-Implement-lockless-pipelined-wakeups.patch vendored
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@ -2,7 +2,7 @@ From 9a69dce752915917ecfe06a21f9c826c76f6eb07 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 30 Oct 2015 11:59:07 +0100 Date: Fri, 30 Oct 2015 11:59:07 +0100
Subject: [PATCH] ipc/msg: Implement lockless pipelined wakeups Subject: [PATCH] ipc/msg: Implement lockless pipelined wakeups
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
This patch moves the wakeup_process() invocation so it is not done under This patch moves the wakeup_process() invocation so it is not done under
the perm->lock by making use of a lockless wake_q. With this change, the the perm->lock by making use of a lockless wake_q. With this change, the

2
debian/patches/features/all/rt/ipc-sem-rework-semaphore-wakeups.patch vendored
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@ -1,7 +1,7 @@
Subject: ipc/sem: Rework semaphore wakeups Subject: ipc/sem: Rework semaphore wakeups
From: Peter Zijlstra <peterz@infradead.org> From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 14 Sep 2011 11:57:04 +0200 Date: Wed, 14 Sep 2011 11:57:04 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Current sysv sems have a weird ass wakeup scheme that involves keeping Current sysv sems have a weird ass wakeup scheme that involves keeping
preemption disabled over a potential O(n^2) loop and busy waiting on preemption disabled over a potential O(n^2) loop and busy waiting on

2
debian/patches/features/all/rt/irq-allow-disabling-of-softirq-processing-in-irq-thread-context.patch vendored
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@ -1,7 +1,7 @@
Subject: genirq: Allow disabling of softirq processing in irq thread context Subject: genirq: Allow disabling of softirq processing in irq thread context
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 31 Jan 2012 13:01:27 +0100 Date: Tue, 31 Jan 2012 13:01:27 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
The processing of softirqs in irq thread context is a performance gain 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 for the non-rt workloads of a system, but it's counterproductive for

2
debian/patches/features/all/rt/irqwork-Move-irq-safe-work-to-irq-context.patch vendored
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@ -1,7 +1,7 @@
Subject: irqwork: Move irq safe work to irq context Subject: irqwork: Move irq safe work to irq context
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 15 Nov 2015 18:40:17 +0100 Date: Sun, 15 Nov 2015 18:40:17 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
On architectures where arch_irq_work_has_interrupt() returns false, we On architectures where arch_irq_work_has_interrupt() returns false, we
end up running the irq safe work from the softirq context. That end up running the irq safe work from the softirq context. That

2
debian/patches/features/all/rt/irqwork-push_most_work_into_softirq_context.patch vendored
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@ -1,7 +1,7 @@
Subject: irqwork: push most work into softirq context Subject: irqwork: push most work into softirq context
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 23 Jun 2015 15:32:51 +0200 Date: Tue, 23 Jun 2015 15:32:51 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Initially we defered all irqwork into softirq because we didn't want the 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. latency spikes if perf or another user was busy and delayed the RT task.

2
debian/patches/features/all/rt/jump-label-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: jump-label: disable if stop_machine() is used Subject: jump-label: disable if stop_machine() is used
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 08 Jul 2015 17:14:48 +0200 Date: Wed, 08 Jul 2015 17:14:48 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Some architectures are using stop_machine() while switching the opcode which Some architectures are using stop_machine() while switching the opcode which
leads to latency spikes. leads to latency spikes.

2
debian/patches/features/all/rt/kconfig-disable-a-few-options-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: kconfig: Disable config options which are not RT compatible Subject: kconfig: Disable config options which are not RT compatible
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 24 Jul 2011 12:11:43 +0200 Date: Sun, 24 Jul 2011 12:11:43 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Disable stuff which is known to have issues on RT Disable stuff which is known to have issues on RT

2
debian/patches/features/all/rt/kconfig-preempt-rt-full.patch vendored
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@ -1,7 +1,7 @@
Subject: kconfig: Add PREEMPT_RT_FULL Subject: kconfig: Add PREEMPT_RT_FULL
From: Thomas Gleixner <tglx@linutronix.de> From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 29 Jun 2011 14:58:57 +0200 Date: Wed, 29 Jun 2011 14:58:57 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
Introduce the final symbol for PREEMPT_RT_FULL. Introduce the final symbol for PREEMPT_RT_FULL.

2
debian/patches/features/all/rt/kernel-SRCU-provide-a-static-initializer.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 19 Mar 2013 14:44:30 +0100 Date: Tue, 19 Mar 2013 14:44:30 +0100
Subject: [PATCH] kernel/SRCU: provide a static initializer Subject: [PATCH] kernel/SRCU: provide a static initializer
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
There are macros for static initializer for the three out of four There are macros for static initializer for the three out of four
possible notifier types, that are: possible notifier types, that are:

2
debian/patches/features/all/rt/kernel-cpu-fix-cpu-down-problem-if-kthread-s-cpu-is-.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 7 Jun 2013 22:37:06 +0200 Date: Fri, 7 Jun 2013 22:37:06 +0200
Subject: kernel/cpu: fix cpu down problem if kthread's cpu is going down Subject: kernel/cpu: fix cpu down problem if kthread's cpu is going down
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
If kthread is pinned to CPUx and CPUx is going down then we get into If kthread is pinned to CPUx and CPUx is going down then we get into
trouble: trouble:

2
debian/patches/features/all/rt/kernel-hotplug-restore-original-cpu-mask-oncpu-down.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 14 Jun 2013 17:16:35 +0200 Date: Fri, 14 Jun 2013 17:16:35 +0200
Subject: kernel/hotplug: restore original cpu mask oncpu/down Subject: kernel/hotplug: restore original cpu mask oncpu/down
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
If a task which is allowed to run only on CPU X puts CPU Y down then it If a task which is allowed to run only on CPU X puts CPU Y down then it
will be allowed on all CPUs but the on CPU Y after it comes back from will be allowed on all CPUs but the on CPU Y after it comes back from

2
debian/patches/features/all/rt/kgb-serial-hackaround.patch vendored
View File

@ -1,7 +1,7 @@
From: Jason Wessel <jason.wessel@windriver.com> From: Jason Wessel <jason.wessel@windriver.com>
Date: Thu, 28 Jul 2011 12:42:23 -0500 Date: Thu, 28 Jul 2011 12:42:23 -0500
Subject: kgdb/serial: Short term workaround Subject: kgdb/serial: Short term workaround
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
On 07/27/2011 04:37 PM, Thomas Gleixner wrote: On 07/27/2011 04:37 PM, Thomas Gleixner wrote:
> - KGDB (not yet disabled) is reportedly unusable on -rt right now due > - KGDB (not yet disabled) is reportedly unusable on -rt right now due

4
debian/patches/features/all/rt/latency-hist.patch vendored
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@ -1,7 +1,7 @@
Subject: tracing: Add latency histograms Subject: tracing: Add latency histograms
From: Carsten Emde <C.Emde@osadl.org> From: Carsten Emde <C.Emde@osadl.org>
Date: Tue, 19 Jul 2011 14:03:41 +0100 Date: Tue, 19 Jul 2011 14:03:41 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
This patch provides a recording mechanism to store data of potential This patch provides a recording mechanism to store data of potential
sources of system latencies. The recordings separately determine the sources of system latencies. The recordings separately determine the
@ -229,7 +229,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
void *start_site; void *start_site;
--- a/include/linux/sched.h --- a/include/linux/sched.h
+++ b/include/linux/sched.h +++ b/include/linux/sched.h
@@ -1794,6 +1794,12 @@ struct task_struct { @@ -1795,6 +1795,12 @@ struct task_struct {
unsigned long trace; unsigned long trace;
/* bitmask and counter of trace recursion */ /* bitmask and counter of trace recursion */
unsigned long trace_recursion; unsigned long trace_recursion;

2
debian/patches/features/all/rt/latency_hist-update-sched_wakeup-probe.patch vendored
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@ -1,7 +1,7 @@
Subject: latency_hist: Update sched_wakeup probe Subject: latency_hist: Update sched_wakeup probe
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Sun, 25 Oct 2015 18:06:05 -0400 Date: Sun, 25 Oct 2015 18:06:05 -0400
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4-rc6-rt1/patches-4.4-rc6-rt1.tar.xz Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.4/patches-4.4-rt2.tar.xz
"sched: Introduce the 'trace_sched_waking' tracepoint" introduces a "sched: Introduce the 'trace_sched_waking' tracepoint" introduces a
prototype change for the sched_wakeup probe: the "success" argument is prototype change for the sched_wakeup probe: the "success" argument is

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