linux-kernel - Re: [RFC PATCH v2 07/17] cgroup: Prevent kill

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Message-ID: <20170517192357.GC942@htj.duckdns.org>
Date:   Wed, 17 May 2017 15:23:57 -0400
From:   Tejun Heo <tj@...nel.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-mm@...ck.org, kernel-team@...com, pjt@...gle.com,
        luto@...capital.net, efault@....de
Subject: Re: [RFC PATCH v2 07/17] cgroup: Prevent kill_css() from being
 called more than once

Hello,

On Mon, May 15, 2017 at 09:34:06AM -0400, Waiman Long wrote:
> The kill_css() function may be called more than once under the condition
> that the css was killed but not physically removed yet followed by the
> removal of the cgroup that is hosting the css. This patch prevents any
> harmm from being done when that happens.
> 
> Signed-off-by: Waiman Long <longman@...hat.com>

So, this is a bug fix which isn't really related to this patchset.
I'm applying it to cgroup/for-4.12-fixes w/ stable cc'd.

Thanks.

-- 
tejun