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From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Fix the race between walk_tg_tree and sched_create_group
Date: Thu, 14 Aug 2008 10:46:06 +0200	[thread overview]
Message-ID: <20080814084606.GB1650@elte.hu> (raw)
In-Reply-To: <1218702968.10800.199.camel@twins>


* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:

> On Wed, 2030-08-14 at 15:56 +0800, Zhang, Yanmin wrote:
> > With 2.6.27-rc3, I hit a kernel panic when running volanoMark on my
> > new x86_64 machine. I also hit it with other 2.6.27-rc kernels.
> > See below log.
> > 
> > Basically, function walk_tg_tree and sched_create_group have a race between
> > accessing and initiating tg->children. Below patch fixes it by moving 
> > tg->children initiation to the front of linking tg->siblings to parent->children.
> > 
> > Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com>
> 
> Nice catch
> 
> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>

applied to tip/sched/urgent - thanks.

	Ingo

      reply	other threads:[~2008-08-14  8:46 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2030-08-14  7:56 [PATCH] Fix the race between walk_tg_tree and sched_create_group Zhang, Yanmin
2008-08-14  8:36 ` Peter Zijlstra
2008-08-14  8:46   ` Ingo Molnar [this message]

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