2020-06-23 13:42:59 +00:00
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From 5de7d5f1057536b8240b95d51c4dadda432cb394 Mon Sep 17 00:00:00 2001
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Message-Id: <5de7d5f1057536b8240b95d51c4dadda432cb394.1592846147.git.zanussi@kernel.org>
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In-Reply-To: <07cd0dbc80b976663c80755496a03f288decfe5a.1592846146.git.zanussi@kernel.org>
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References: <07cd0dbc80b976663c80755496a03f288decfe5a.1592846146.git.zanussi@kernel.org>
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2020-02-21 18:07:43 +00:00
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From: Juri Lelli <juri.lelli@redhat.com>
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Date: Wed, 31 Jul 2019 12:37:15 +0200
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2020-06-23 13:42:59 +00:00
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Subject: [PATCH 289/330] sched/deadline: Ensure inactive_timer runs in hardirq
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2020-02-21 18:07:43 +00:00
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context
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2020-06-23 13:42:59 +00:00
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.127-rt55.tar.xz
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2020-02-21 18:07:43 +00:00
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[ Upstream commit ba94e7aed7405c58251b1380e6e7d73aa8284b41 ]
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SCHED_DEADLINE inactive timer needs to run in hardirq context (as
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dl_task_timer already does) on PREEMPT_RT
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Change the mode to HRTIMER_MODE_REL_HARD.
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[ tglx: Fixed up the start site, so mode debugging works ]
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Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Link: https://lkml.kernel.org/r/20190731103715.4047-1-juri.lelli@redhat.com
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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---
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kernel/sched/deadline.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
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index 974a8f9b615a..929167a1d991 100644
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--- a/kernel/sched/deadline.c
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+++ b/kernel/sched/deadline.c
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@@ -287,7 +287,7 @@ static void task_non_contending(struct task_struct *p)
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dl_se->dl_non_contending = 1;
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get_task_struct(p);
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- hrtimer_start(timer, ns_to_ktime(zerolag_time), HRTIMER_MODE_REL);
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+ hrtimer_start(timer, ns_to_ktime(zerolag_time), HRTIMER_MODE_REL_HARD);
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}
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static void task_contending(struct sched_dl_entity *dl_se, int flags)
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@@ -1325,7 +1325,7 @@ void init_dl_inactive_task_timer(struct sched_dl_entity *dl_se)
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{
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struct hrtimer *timer = &dl_se->inactive_timer;
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- hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
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+ hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD);
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timer->function = inactive_task_timer;
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}
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--
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2020-06-22 13:14:16 +00:00
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2.17.1
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2020-02-21 18:07:43 +00:00
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