linux-kernel - Re: [PATCH] memcg: don't initialize kmem-cache destroying work for root caches

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Message-ID: <20130514144427.GS5198@dhcp22.suse.cz>
Date:	Tue, 14 May 2013 16:44:27 +0200
From:	Michal Hocko <mhocko@...e.cz>
To:	Andrey Vagin <avagin@...nvz.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	cgroups@...r.kernel.org,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	Glauber Costa <glommer@...allels.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Balbir Singh <bsingharora@...il.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH] memcg: don't initialize kmem-cache destroying work for
 root caches

On Tue 14-05-13 16:40:31, Michal Hocko wrote:
> On Tue 14-05-13 16:38:38, Andrey Vagin wrote:
> > struct memcg_cache_params has a union. Different parts of this union are
> > used for root and non-root caches. A part with destroying work is used only
> > for non-root caches.
> 
> but memcg_update_cache_size is called only for !root caches AFAICS
> (check memcg_update_all_caches)

Ohh, I am blind. memcg_update_all_caches skips all !root caches.
Then the patch looks correct. If Glauber has nothing against then thise
should be marked for stable (3.9)
-- 
Michal Hocko
SUSE Labs
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