linux-kernel - Re: [PATCH 2/2] cgroup: make css->refcnt clearing on cgroup removal optional

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Message-ID: <CA+1xoqe5hMuxzCRhMy7J0XchDk2ZnuxOHJKikROk1-ReAzcT6g@mail.gmail.com>
Date:	Thu, 17 May 2012 00:33:05 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Li Zefan <lizefan@...wei.com>,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org, fweisbec@...il.com, rni@...gle.com,
	ctalbott@...gle.com, Vivek Goyal <vgoyal@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>,
	Balbir Singh <bsingharora@...il.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH 2/2] cgroup: make css->refcnt clearing on cgroup removal optional

Hi Tejun,

On Sun, Apr 1, 2012 at 8:54 PM, Tejun Heo <tj@...nel.org> wrote:
> Hello, Li.
>
> On Sun, Apr 01, 2012 at 10:00:26AM +0800, Li Zefan wrote:
>> > Signed-off-by: Tejun Heo <tj@...nel.org>
>>
>> Both patches look good.
>>
>> Acked-by: Li Zefan <lizefan@...wei.com>
>
> Alright, adding the patches to cgroup/for-3.5.

This patch allows for race when removing a cgroup since one of the
css's may still have a dentry ref when the cgroup is removed, no? Is
there a plan to deal with that before this patch gets pushed into 3.5?
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