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

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Date:	Thu, 18 Nov 2010 16:35:51 -0700
From:	Mike Galbraith <efault@....de>
To:	Samuel Thibault <samuel.thibault@...-lyon.org>
Cc:	Hans-Peter Jansen <hpj@...la.net>, linux-kernel@...r.kernel.org,
	Lennart Poettering <mzxreary@...inter.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>, david@...g.hm,
	Dhaval Giani <dhaval.giani@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	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>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>
Subject: Re: [RFC/RFT PATCH v3] sched: automated per tty task groups

On Fri, 2010-11-19 at 00:12 +0100, Samuel Thibault wrote:
> Hans-Peter Jansen, le Thu 18 Nov 2010 23:33:46 +0100, a écrit :
> > As already mentioned countless times (and some of it was even renamed 
> > for this very fact): the grouping by tty is just a starter. There are 
> > plenty of other possibilities to group the scheduling. The hard part is 
> > to find the right grouping concepts, that are making sense in the 
> > usability department _and_ are easy enough to be picked up from our 
> > favorite system and desktop environments. That's where the generic 
> > cgroup concept seems to be lacking ATM..
> 
> Actually, cgroups should probably be completely hierarchical: sessions
> contain process groups, which contain processes, which contain threads.
> You could also gather sessions with the same uid.

Hierarchical is ~tempting, but adds overhead for not much gain.

	-Mike

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