linux-kernel - Re: [RFC][PATCH 0/1]a new optional function for task assignment to cgroup

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Message-ID: <20080305071338.GA7588@linux.vnet.ibm.com>
Date:	Wed, 5 Mar 2008 12:43:38 +0530
From:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
To:	Paul Menage <menage@...gle.com>
Cc:	Kazunaga Ikeno <k-ikeno@...jp.nec.com>,
	containers@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 0/1]a new optional function for task assignment to
	cgroup

On Tue, Mar 04, 2008 at 09:56:13PM -0800, Paul Menage wrote:
> Hi Kazunaga,
> 
> On Tue, Mar 4, 2008 at 9:39 PM, Kazunaga Ikeno <k-ikeno@...jp.nec.com> wrote:
> > Hi -
> >
> >  This is a patch of a new optional function for task assignment to cgroup, RFC.
> >
> >
> >  == Purpose =================================================
> >
> >  To provide the function that leads a task, corresponding to the conditions specified
> >  beforehand, to a specific cgroup directory.
> >
> 
> This is something that's been discussed before, originally as part of
> CKRM with a complex rule engine in the kernel space.
> 
> Basically, the general agreement was that it's a case where a simple
> API is going to be too simple for the majority of users, and a complex
> API that satisfies everyone is going to be too messy/heavyweight.
> 
> This is something that can be done in a userspace daemon via the
> process events connector - when you get a PROC_EVENT_UID event, you
> can move the process into the appropriate cgroup (you may also need to
> check any recently-forked children). This also gives you more
> flexibility than you can have in the kernel - you can base your
> decision on more complex factors than simply the uid of the process.
> 
> Dhaval Giani had a prototype implementation of such a daemon.
> 

The daemon was posted at
http://article.gmane.org/gmane.linux.kernel/553267 . At that point
control groups were called containers. These corrections will have to
made for it to run.

If I can get the time, I will clean it up and try to put it up
somewhere.

Thanks,

-- 
regards,
Dhaval
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