linux-kernel - Re: [PATCH 5/6] memcg: make mem_cgroup_reparent

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Message-ID: <20121018224807.GT13370@google.com>
Date:	Thu, 18 Oct 2012 15:48:07 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Michal Hocko <mhocko@...e.cz>
Cc:	linux-mm@...ck.org, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org, Li Zefan <lizefan@...wei.com>,
	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Balbir Singh <bsingharora@...il.com>
Subject: Re: [PATCH 5/6] memcg: make mem_cgroup_reparent_charges non failing

On Wed, Oct 17, 2012 at 03:30:47PM +0200, Michal Hocko wrote:
> Now that pre_destroy callbacks are called from within cgroup_lock and
> the cgroup has been checked to be empty without any children then there
> is no other way to fail.
> mem_cgroup_pre_destroy doesn't have to take a reference to memcg's css
> because all css' are marked dead already.
> 
> Signed-off-by: Michal Hocko <mhocko@...e.cz>

Reviewed-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun
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