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

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Date:	Fri, 02 Mar 2012 12:24:51 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Michal Schmidt <mschmidt@...hat.com>
Cc:	Mike Galbraith <efault@....de>, Vivek Goyal <vgoyal@...hat.com>,
	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 Fri, 2012-03-02 at 12:16 +0100, Michal Schmidt wrote:
> On 03/01/2012 09:26 PM, 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?
> 
> It does more than sysvinit. It does more than fork off services and then 
> forget about them. It keeps track of them all the time.
> It notices when all processes of a service have exited.
> It can kill all processes descended from a service.
> It can always tell what service a given process belongs to.

And I don't give a crap about any of that.. sysvinit was sufficient. 
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