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Date:	Thu, 15 Jan 2009 20:34:28 -0800
From:	Paul Menage <menage@...gle.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"lizf@...fujitsu.com" <lizf@...fujitsu.com>,
	containers@...ts.linux-foundation.org,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: [PATCH] use hierarchy mutex in creation failure path

On Thu, Jan 15, 2009 at 7:17 PM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@...fujitsu.com> wrote:
> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
>
> Now, cgrp->sibling is handled under hierarchy mutex.
> error route should do so, too.
>
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

Acked-by Paul Menage <menage@...gle.com>

Good catch, thanks.

Paul

>
> ---
>  kernel/cgroup.c |    2 ++
>  1 file changed, 2 insertions(+)
>
> Index: mmotm-2.6.29-Jan14/kernel/cgroup.c
> ===================================================================
> --- mmotm-2.6.29-Jan14.orig/kernel/cgroup.c
> +++ mmotm-2.6.29-Jan14/kernel/cgroup.c
> @@ -2434,7 +2434,9 @@ static long cgroup_create(struct cgroup
>
>  err_remove:
>
> +       cgroup_lock_hierarchy(root);
>        list_del(&cgrp->sibling);
> +       cgroup_unlock_hierarchy(root);
>        root->number_of_cgroups--;
>
>  err_destroy:
>
>
--
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