linux-kernel - Re: [PATCH 2/2] cgroup: remove synchronize_rcu() from rebind

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Message-ID: <20130114185512.GG27942@mtj.dyndns.org>
Date:	Mon, 14 Jan 2013 10:55:12 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Li Zefan <lizefan@...wei.com>
Cc:	Colin Cross <ccross@...gle.com>, Mike Galbraith <efault@....de>,
	LKML <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>
Subject: Re: [PATCH 2/2] cgroup: remove synchronize_rcu() from
 rebind_subsystems()

On Mon, Jan 14, 2013 at 05:24:18PM +0800, Li Zefan wrote:
> Nothing's protected by RCU in rebind_subsystems(), and I can't think
> of a reason why it is needed.
> 
> Signed-off-by: Li Zefan <lizefan@...wei.com>

Applied to cgroup/for-3.9.  We probably should synchornize_rcu() from
cgroup_diput() too.  Probably by punting css_free() and cgrp freeing
to a work item from call_rcu() callback.

Thanks.

-- 
tejun
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