linux-kernel - Re: [RFC][PATCH 1/7] memcg: use css_get in sock_update

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Date:	Fri, 05 Apr 2013 14:01:31 +0900
From:	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Li Zefan <lizefan@...wei.com>
CC:	linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>, Tejun Heo <tj@...nel.org>,
	Glauber Costa <glommer@...allels.com>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [RFC][PATCH 1/7] memcg: use css_get in sock_update_memcg()

(2013/04/03 18:11), Li Zefan wrote:
> Use css_get/css_put instead of mem_cgroup_get/put.
> 
> Note, if at the same time someone is moving @current to a different
> cgroup and removing the old cgroup, css_tryget() may return false,
> and sock->sk_cgrp won't be initialized.
> 
> Signed-off-by: Li Zefan <lizefan@...wei.com>

Thank you.
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>


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