Re: kernel/timer: avoid spurious ksoftirqd wakeups (v2)

From: Thomas Gleixner
Date: Sat Apr 11 2015 - 05:25:31 EST


On Fri, 10 Apr 2015, Luiz Capitulino wrote:
> On Fri, 10 Apr 2015 15:09:07 -0300
> > It seems a valid solution for this interrupt is to program
> > sched_timer to the nearest future possible.
>
> What about calling the timer function right there, like
> hrtimer_interrupt() does?

No, you cannot call the timer function from the enqueue path. The
caller might hold a lock which is taken in the callback as well.....

Thanks,

tglx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/