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nohz: Add hrtimer sanity check 

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2017-05-11 16:36:19 +02:00 committed by Ingo Molnar
parent b23afd3848
commit ce6cf9a15d
1 changed files with 7 additions and 2 deletions
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9
kernel/time/tick-sched.c
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@ -771,8 +771,13 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
tick = expires;
/* Skip reprogram of event if its not changed */
if (ts->tick_stopped && (expires == dev->next_event))
goto out;
if (ts->tick_stopped) {
if (hrtimer_active(&ts->sched_timer))
WARN_ON_ONCE(hrtimer_get_expires(&ts->sched_timer) < dev->next_event);
if (expires == dev->next_event)
goto out;
}
/*
* nohz_stop_sched_tick can be called several times before