linux-kernel - Re: [RFC] cgroups: Resource controller for open files.

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Message-ID: <20140702144901.GC23275@htj.dyndns.org>
Date:	Wed, 2 Jul 2014 10:49:01 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Binder Makin <merimus@...gle.com>
Cc:	viro@...iv.linux.org.uk, linux-kernel@...r.kernel.org,
	Daniel Jacobowitz <dmj@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>, Li Zefan <lizefan@...wei.com>,
	cgroups@...r.kernel.org
Subject: Re: [RFC] cgroups: Resource controller for open files.

Hello,

On Wed, Jul 02, 2014 at 10:46:59AM -0400, Binder Makin wrote:
> kmem keeps the cgroup from DOSing the machine but then you can get a ENOMEM
> out of some call which is trying to allocate kernel memory.
> People are used to limiting file handles from rlimits and the EMFILE is
> easier for them to debug/fix.

EMFILE instead of ENOMEM seems really thin as the sole rationale for a
whole new controller, doesn't it?

Thanks.

-- 
tejun
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