Re: [PATCH] Fix the race between walk_tg_tree andsched_create_group

[Ingo Molnar]

* Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> 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@xxxxxxxxxxxxxxx>
> 
> Nice catch
> 
> Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>

applied to tip/sched/urgent - thanks.

	Ingo
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