linux-kernel - Re: [PATCH v5 11/18] sl[au]b: Allocate objects from memcg cache

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Message-ID: <0000013a7a8fa99f-7e29b325-7cd3-4295-a568-dcfd536d92e6-000000@email.amazonses.com>
Date:	Fri, 19 Oct 2012 19:46:06 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Glauber Costa <glommer@...allels.com>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	cgroups@...r.kernel.org, Mel Gorman <mgorman@...e.de>,
	Tejun Heo <tj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>,
	kamezawa.hiroyu@...fujitsu.com,
	David Rientjes <rientjes@...gle.com>,
	Pekka Enberg <penberg@...nel.org>, devel@...nvz.org,
	Pekka Enberg <penberg@...helsinki.fi>,
	Suleiman Souhlal <suleiman@...gle.com>
Subject: Re: [PATCH v5 11/18] sl[au]b: Allocate objects from memcg cache

On Fri, 19 Oct 2012, Glauber Costa wrote:

> We are able to match a cache allocation to a particular memcg.  If the
> task doesn't change groups during the allocation itself - a rare event,
> this will give us a good picture about who is the first group to touch a
> cache page.

No that the infrastructure is being reworked currently which will allow
you to do this without much of a modification of individual allocators.
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