linux-kernel - Re: [PATCH v3 05/16] consider a memcg parameter in kmem_create

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Message-ID: <00000139f8836571-6ddc9d5b-1d5f-4542-92f9-ad11070e5b7d-000000@email.amazonses.com>
Date:	Mon, 24 Sep 2012 13:42:05 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Glauber Costa <glommer@...allels.com>
cc:	Tejun Heo <tj@...nel.org>,
	"<linux-kernel@...r.kernel.org>" <linux-kernel@...r.kernel.org>,
	"<cgroups@...r.kernel.org>" <cgroups@...r.kernel.org>,
	"<kamezawa.hiroyu@...fujitsu.com>" <kamezawa.hiroyu@...fujitsu.com>,
	"<devel@...nvz.org>" <devel@...nvz.org>,
	"<linux-mm@...ck.org>" <linux-mm@...ck.org>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mel Gorman <mgorman@...e.de>,
	David Rientjes <rientjes@...gle.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH v3 05/16] consider a memcg parameter in
 kmem_create_cache

On Mon, 24 Sep 2012, Glauber Costa wrote:

> But that is orthogonal, isn't it? People will still expect to see it in
> the old slabinfo file.

The current scheme for memory statistics is

/proc/meminfo contains global counters

/sys/devices/system/node/nodeX/meminfo

contains node specific counters.

The cgroups directory already contains various files. Adding a slabinfo
file would make sense and it could be found easily.

The sysfs hierachy /sys/kernel/slab could also show up there as a "slab"
directory under which all the details of the various caches would be
available and tunable. Very much in sync with the way the cgroups
directories operate.


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