linux-kernel - Re: [PATCH 5/7] cgroup: use restart_syscall() for retries after offline waits in cgroup_subtree_control

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Message-ID: <20140513151907.GF23710@htj.dyndns.org>
Date:	Tue, 13 May 2014 11:19:07 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Li Zefan <lizefan@...wei.com>
Cc:	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/7] cgroup: use restart_syscall() for retries after
 offline waits in cgroup_subtree_control_write()

On Tue, May 13, 2014 at 01:00:11PM +0800, Li Zefan wrote:
> Hi Tejun,
> 
> On 2014/5/10 3:32, Tejun Heo wrote:
> > After waiting for a child to finish offline,
> > cgroup_subtree_control_write() jumps up to retry from after the input
> > parsing and active protection breaking.  This retry makes the
> > scheduled locking update more difficult.
> 
> Could you explain this sentence more specific? I don't understand what
> "scheduled locking update" means.

Updating it to "planned cgroup_tree_mutex removal".

Thanks.

-- 
tejun
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