linux-kernel - Re: [PATCH v3 19/28] slab: per-memcg accounting of slab caches

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Message-ID: <4FC4F42D.6060601@parallels.com>
Date:	Tue, 29 May 2012 20:07:09 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	Christoph Lameter <cl@...ux.com>
CC:	<linux-kernel@...r.kernel.org>, <cgroups@...r.kernel.org>,
	<linux-mm@...ck.org>, <kamezawa.hiroyu@...fujitsu.com>,
	Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>,
	Greg Thelen <gthelen@...gle.com>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>, <devel@...nvz.org>,
	David Rientjes <rientjes@...gle.com>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [PATCH v3 19/28] slab: per-memcg accounting of slab caches

On 05/29/2012 06:52 PM, Christoph Lameter wrote:
> On Fri, 25 May 2012, Glauber Costa wrote:
>
>> >  This patch charges allocation of a slab object to a particular
>> >  memcg.
> Ok so a requirement is to support tracking of individual slab
> objects to cgroups? That is going to be quite expensive since it will
> touch the hotpaths.
>

No, we track pages. But all the objects in the page belong to the same 
cgroup.


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