linux-kernel - Re: 3.1: NULL pointer dereference after perf usage

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Date:	Sun, 6 Nov 2011 14:40:30 +0100
From:	Andres Freund <andres@...razel.de>
To:	Gleb Natapov <gleb@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: 3.1: NULL pointer dereference after perf usage

Hi,

On Sunday, November 06, 2011 10:12:29 AM Gleb Natapov wrote:
> On Sun, Nov 06, 2011 at 03:58:59AM +0100, Andres Freund wrote:
> > Somewhere in the 3.1 cycle - haven't yet bisected - I started to get
> > somewhat reprodcable crashes after using perf.
> > There is no direct correlation with a concrete action via perf I can
> > see so far but without having used perf the system runs stable.
> 
> Can you try those patches please?
> https://lkml.org/lkml/2011/10/23/163
> https://lkml.org/lkml/2011/10/18/390
After applying those the system runs smoothly - while using perf obviously - 
for over an hour.

Thanks,

Andres
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