Commit 850377a8 authored by Juri Lelli's avatar Juri Lelli Committed by Thomas Gleixner
Browse files

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: default avatarJuri Lelli <juri.lelli@redhat.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190731103715.4047-1-juri.lelli@redhat.com
parent 030dcdd1

kernel/sched/deadline.c

+2 −2
Original line number Diff line number Diff line
@@ -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;

}

CRA Git | Maintained and supported by SUSTech CRA and CCSE