linux-kernel - Re: [PATCH v5 14/14] Add documentation about the kmem controller

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Message-ID: <0000013a6b0e332a-81258f37-814f-4b7e-8b95-193ecb9d7b9d-000000@email.amazonses.com>
Date:	Tue, 16 Oct 2012 19:30:23 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Glauber Costa <glommer@...allels.com>
cc:	linux-mm@...ck.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,
	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...hat.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Suleiman Souhlal <suleiman@...gle.com>
Subject: Re: [PATCH v5 14/14] Add documentation about the kmem controller

On Tue, 16 Oct 2012, Glauber Costa wrote:

> A limitation of kernel memory use would be good, for example, to prevent
> abuse from non-trusted containers in a high density, shared, container
> environment.

But that would be against intentional abuse by someone who has code that
causes the kernel to use a lot of memory on its behalf. We already need
protection from that without memcg.

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