linux-kernel - Re: [BUG] 2.6.38-rc1-git1: hard lockup related to i915 / automated cgroup scheduling

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Date:	Thu, 20 Jan 2011 20:17:53 +0100
From:	Mike Galbraith <efault@....de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Knut Petersen <Knut_Petersen@...nline.de>, airlied@...ux.ie,
	jesse.barnes@...el.com, linux-kernel@...r.kernel.org,
	intel-gfx <intel-gfx@...ts.freedesktop.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [BUG] 2.6.38-rc1-git1: hard lockup related to i915 / automated
 cgroup scheduling

On Thu, 2011-01-20 at 09:58 -0800, Linus Torvalds wrote:
> On Thu, Jan 20, 2011 at 9:29 AM, Knut Petersen
> <Knut_Petersen@...nline.de> wrote:
> > Kernel 2.6.38-rc1 and -git1 will lock my AOpen i915GMm-HFS
> > at the end of  KDE startup if automatic process group scheduling
> > is actived in kernel config. A hard reset is necessary.
> > Without automatic process group scheduling everything is ok.
> 
> Interesting. Most likely timing-related, but maybe there's some actual
> memory corruption. Adding the scheduler guys just in case.

I have a laptop with intel hw, will try it as soon as I can, but that
won't be tomorrow for sure, weekend at the earliest.

Knut: please send me your .config offline.

	-Mike

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