Re: [sched] WARNING: CPU: 0 PID: 0 at kernel/time/hrtimer.c:802 hrtimer_forward()

[Peter Zijlstra]

On Fri, May 01, 2015 at 12:47:13PM +0800, Fengguang Wu wrote:
> commit 77a4d1a1b9a122ca1fa3507bd30aec1520d7a8a4
>     sched: Cleanup bandwidth timers

> [   64.000438] WARNING: CPU: 0 PID: 0 at kernel/time/hrtimer.c:802 hrtimer_forward+0x71/0x189()

Argh, yes of course. The problem is that the timer can be re-started
before the handler acquires the lock, and therefore the hrtimer_forwards
in the handler will trigger that WARN.

Lemme try and go convince this heap of snot that's occupying my brain
cavity to produce coherent thought and come up with a nice fix for that.
--
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/