linux-kernel - Re: [PATCH] new cgroup controller "fork"

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Date:	Thu, 3 Nov 2011 18:16:45 +0100
From:	Max Kellermann <mk@...all.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org,
	Li Zefan <lizf@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Tim Hockin <thockin@...kin.org>
Subject: Re: [PATCH] new cgroup controller "fork"

On 2011/11/03 17:43, Frederic Weisbecker <fweisbec@...il.com> wrote:
> Please have a look at the task counter subsystem: https://lwn.net/Articles/461462/
> 
> It's in the -mm tree. I'm glad to hear about another user who wants
> this feature in cgroups. We need to hear about you and whether this
> meets your requirements in order to get it merged upstream.

Had a quick look at your patch set.  No, it does not seem to meet my
requirements.  It limits the number of processes in a cgroup - that is
also very useful, but is different from my controller.

My controller limits the number of fork() calls, not the number of
processes running at a time.

I've been using it for 7 years to put an upper bound on CGI resource
usage in a shared hosting environment at my employer (initially based
on a proprietary cgroup-like subsystem I wrote, when cgroups were not
available yet).

Max
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