linux-kernel - Re: [BUG] 2.6.23-git8 kernel oops at __rb_rotate

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Message-ID: <20071017144352.GF21136@shadowen.org>
Date:	Wed, 17 Oct 2007 15:43:52 +0100
From:	Andy Whitcroft <apw@...dowen.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	torvalds@...ux-foundation.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Mike Galbraith <efault@....de>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
Subject: Re: [BUG] 2.6.23-git8 kernel oops at __rb_rotate_left+0x7/0x70

On Wed, Oct 17, 2007 at 04:21:40PM +0200, Ingo Molnar wrote:
> 
> * Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com> wrote:
> 
> > While running kernbench with the 2.6.23-git8 following oops is 
> > produced
> 
> Dmitry found something that might explain the crash: could you check 
> whether the patch below fixes it?
> 
> 	Ingo
> 
> ---------------------->
> Subject: sched: fix new task startup crash
> From: Ingo Molnar <mingo@...e.hu>
> 
> this should fix the put_prev_task crashes that were reported,
> Dmitry Adamushko noticed that it's not valid to call into
> task_new_fair() if this_cpu != task_cpu(p).
> 
> Reported-by: Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
> Reported-by: Andy Whitcroft <apw@...dowen.org>
> Signed-off-by: Ingo Molnar <mingo@...e.hu>

I have submitted jobs against a couple of the releases which showed this
problem with this patch.  They will be a while as there are other tests
running at the moment.  Will let you know when they are done.

-apw
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