On Wed, Aug 28, 2019 at 11:03:33AM -0000, tip-bot2 for Sebastian Andrzej Siewior wrote: > The following commit has been merged into the timers/core branch of tip: > > Commit-ID: 71fed982d63cb2bb88db6f36059e3b14a7913846 > Gitweb: > https://git.kernel.org/tip/71fed982d63cb2bb88db6f36059e3b14a7913846 > Author: Sebastian Andrzej Siewior <bige...@linutronix.de> > AuthorDate: Fri, 23 Aug 2019 13:38:45 +02:00 > Committer: Thomas Gleixner <t...@linutronix.de> > CommitterDate: Wed, 28 Aug 2019 13:01:26 +02:00 > > tick: Mark sched_timer to expire in hard interrupt context > > sched_timer must be initialized with the _HARD mode suffix to ensure expiry > in hard interrupt context on RT. > > The previous conversion to HARD expiry mode missed on one instance in > tick_nohz_switch_to_nohz(). Fix it up. > > Fixes: 902a9f9c50905 ("tick: Mark tick related hrtimers to expiry in hard > interrupt context") > Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de> > Signed-off-by: Thomas Gleixner <t...@linutronix.de> > Link: https://lkml.kernel.org/r/20190823113845.12125-3-bige...@linutronix.de > > --- > kernel/time/tick-sched.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c > index 01ff32a..9558517 100644 > --- a/kernel/time/tick-sched.c > +++ b/kernel/time/tick-sched.c > @@ -1233,7 +1233,7 @@ static void tick_nohz_switch_to_nohz(void) > * Recycle the hrtimer in ts, so we can share the > * hrtimer_forward with the highres code. > */ > - hrtimer_init(&ts->sched_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); > + hrtimer_init(&ts->sched_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HARD);
That said, this instance only uses hrtimer for time computing. The backend is clockevent directly. > /* Get the next period */ > next = tick_init_jiffy_update(); >
