linux-kernel - Re: [PATCHSET cgroup/for-3.16] cgroup: implement css->id

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Message-ID: <20140504191811.GB26279@htj.dyndns.org>
Date:	Sun, 4 May 2014 15:18:11 -0400
From:	Tejun Heo <tj@...nel.org>
To:	lizefan@...wei.com
Cc:	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
	hannes@...xchg.org, mhocko@...e.cz, nasa4836@...il.com
Subject: Re: [PATCHSET cgroup/for-3.16] cgroup: implement css->id

On Thu, Apr 24, 2014 at 05:02:07PM -0400, Tejun Heo wrote:
> Hello,
> 
> Until now, cgroup->id has been used to identify all the associated
> csses and css_from_id() takes cgroup ID and returns the matching css
> by looking up the cgroup and then dereferencing the css associated
> with it; however, now that the lifetimes of cgroup and css are
> separate, this is incorrect and breaks on the unified hierarchy when a
> controller is disabled and enabled back again before the previous
> instance is released.

Aplied to cgroup/for-3.16.  I was a bit worried about possible
conflicts with other memcg changes but they don't seem to conflict
anywhere.

Thanks.

-- 
tejun
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