linux-kernel - Re: [PATCH 1/7] mm: memcontrol: charge swap to cgroup2

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Message-ID: <20151214195240.4372e2c9@lxorguk.ukuu.org.uk>
Date:	Mon, 14 Dec 2015 19:52:40 +0000
From:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
To:	Vladimir Davydov <vdavydov@...tuozzo.com>
Cc:	Michal Hocko <mhocko@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/7] mm: memcontrol: charge swap to cgroup2

> Anyway, if you don't trust a container you'd better set the hard memory
> limit so that it can't hurt others no matter what it runs and how it
> tweaks its sub-tree knobs.

If you don't trust it put it in a VM. If it's got access to GEM graphics
ioctls/nodes or some other kernel interfaces then it can blow up the
kernel without trying hard unless its constrained within a VM. VMs can
be extremely light weight if you avoid KVM emulating an entire PC.

Alan
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