From: Juri Lelli Date: Wed, 31 Jul 2019 10:37:15 +0000 (+0200) Subject: sched/deadline: Ensure inactive_timer runs in hardirq context X-Git-Tag: for-5.4/post-2019-09-24~23^2~65 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=850377a875a481c393ce59111b0c9725005e0eb4;p=linux-block.git sched/deadline: Ensure inactive_timer runs in hardirq context SCHED_DEADLINE inactive timer needs to run in hardirq context (as dl_task_timer already does) on PREEMPT_RT Change the mode to HRTIMER_MODE_REL_HARD. [ tglx: Fixed up the start site, so mode debugging works ] Signed-off-by: Juri Lelli Signed-off-by: Thomas Gleixner Link: https://lkml.kernel.org/r/20190731103715.4047-1-juri.lelli@redhat.com --- diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 0359612d5443..83a663a34196 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -287,7 +287,7 @@ static void task_non_contending(struct task_struct *p) dl_se->dl_non_contending = 1; get_task_struct(p); - hrtimer_start(timer, ns_to_ktime(zerolag_time), HRTIMER_MODE_REL); + hrtimer_start(timer, ns_to_ktime(zerolag_time), HRTIMER_MODE_REL_HARD); } static void task_contending(struct sched_dl_entity *dl_se, int flags) @@ -1292,7 +1292,7 @@ void init_dl_inactive_task_timer(struct sched_dl_entity *dl_se) { struct hrtimer *timer = &dl_se->inactive_timer; - hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD); timer->function = inactive_task_timer; }