Re: [BUG 2.6.29] NMI watchdog triggered in rb_insert_color calledfrom enqueue_hrtimer

From: Peter Zijlstra
Date: Wed Apr 08 2009 - 05:47:33 EST


On Wed, 2009-04-08 at 11:24 +0200, Ingo Molnar wrote:
> * Mikael Pettersson <mikpe@xxxxxxxx> wrote:
>
> > Less than an hour after updating a dual Opteron 8384 box from
> > 2.6.29-rc6 (which it had been running for weeks) to 2.6.29 final
> > it died with the following watchdog-detected lockup:
>
> Could you please check whether this is the bug fixed by:
>
> 7f1e2ca: hrtimer: fix rq->lock inversion (again)

Doesn't look like rq->lock recursion, but its worth a try.

Also, hrtimer_wakeup() isn't a self-rearming timer, so its unlikely to
get stuck in a loop, oddness.

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