linux-kernel - Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

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Date:	Tue, 16 Nov 2010 21:06:26 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Lennart Poettering <mzxreary@...inter.de>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Dhaval Giani <dhaval.giani@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>,
	Vivek Goyal <vgoyal@...hat.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>
Subject: Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

On Wed, Nov 17, 2010 at 01:21:59AM +0100, Lennart Poettering wrote:
> > I think you really want to make this be something which the
> > application can specify by default that they should start in their own
> > cgroup.  One idea might be to it to the applications menu entry:
> > 
> > http://standards.freedesktop.org/desktop-entry-spec/latest/
> > 
> > ... so there would be a new key value pair, "start_in_cgroup", that
> > would allow the user to start an application in their own cgroup.  It
> > would be up to the desktop launcher to honor that if it was present.
> 
> This is pretty much in line with what I want to do, except I want
> opt-out, not opt-in behaviour here.

That works for me.  One suggestion is that in addition to "opt-out",
it should be also possible for an application launcher file to specify
a specific cgroup name that should be used.  That would allow multiple
applications in a group to assigned to the same cgroup.

There also needs to be a way to start applications that are started
via the GNOME and KDE session manager in a specified cgroup as well.
I assume that's in your plan as well?

    	      	      	      	      - Ted
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