linux-kernel - Re: [PATCH v3 13/28] slub: create duplicate cache

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Message-ID: <alpine.DEB.2.00.1205291454030.2504@router.home>
Date:	Tue, 29 May 2012 14:55:49 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Glauber Costa <glommer@...allels.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 13/28] slub: create duplicate cache

On Tue, 29 May 2012, Glauber Costa wrote:

> I don't know about cpusets in details, but at least with NUMA, this is not an
> apple-to-apple comparison. a NUMA node is not meant to contain you. A
> container is, and that is why it is called a container.

Cpusets contains sets of nodes. A cpusets "contains" nodes. These sets are
associated with applications.

> NUMA just means what is the *best* node to put my memory.
> Now, if you actually say, through you syscalls "this is the node it should
> live in", then you have a constraint, that to the best of my knowledge is
> respected.

Eith cpusets it means that memory needs to come from an assigned set of
nodes.

> Now isolation here, is done in the container boundary. (cgroups, to be
> generic).

Yes and with cpusets it is done at the cpuset boundary. Very much the
same.
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