linux-kernel - Re: [RFD] cgroup: about multiple hierarchies

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Date:	Thu, 01 Mar 2012 23:04:08 +0100
From:	Mike Galbraith <efault@....de>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Michal Schmidt <mschmidt@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Tejun Heo <tj@...nel.org>, Li Zefan <lizf@...fujitsu.com>,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kay Sievers <kay.sievers@...y.org>,
	Lennart Poettering <lennart@...ttering.net>,
	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org, Christoph Hellwig <hch@...radead.org>
Subject: Re: [RFD] cgroup: about multiple hierarchies

On Thu, 2012-03-01 at 16:02 -0500, Vivek Goyal wrote: 
> On Thu, Mar 01, 2012 at 09:26:43PM +0100, Mike Galbraith wrote:

> > Q: you say systemd requires CONFIG_CGROUPS=y.  Why is that?  It's taking
> > over sysvinits job afaiui, what does that have to do with cgroups?
> 
> I think they were using it to track all the children forked by a service
> and cleanup all of them if need be. So they just need it for logical
> grouping functionality and don't require any controllers as such.

Hm.  Controllers are perhaps not required, but cpu controller was
configured and used without consent.  I didn't receive an offer.

-Mike

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