linux-kernel - Re: [BUG 2.6.29] NMI watchdog triggered in rb_insert_color called from enqueue

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Message-ID: <20090410131051.GD31307@elte.hu>
Date:	Fri, 10 Apr 2009 15:10:51 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Mikael Pettersson <mikpe@...uu.se>, stable@...nel.org
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, tglx@...utronix.de
Subject: Re: [BUG 2.6.29] NMI watchdog triggered in rb_insert_color called
	from enqueue_hrtimer


* Mikael Pettersson <mikpe@...uu.se> wrote:

> Mikael Pettersson writes:
>  > Ingo Molnar writes:
>  >  > 
>  >  > * Mikael Pettersson <mikpe@...uu.se> 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)
>  > 
>  > I am testing this now and will let you know how it goes.
> 
> The machine has now been running 2.6.29 plus that fix for more 
> than 24 hours with no problems. Previously it oopsed and hung 
> within an hour on two separate attempts to run 2.6.29 vanilla.

ok, thanks for testing. The fix is now upstream:

  7f1e2ca: hrtimer: fix rq->lock inversion (again)

-stable team, please pick it up - i just checked, it cherry-picks 
fine on v2.6.29.

	Ingo
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