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

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Message-ID: <1290171113.2109.1574.camel@laptop>
Date:	Fri, 19 Nov 2010 13:51:53 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Paul Menage <menage@...gle.com>
Cc:	Samuel Thibault <samuel.thibault@...-lyon.org>,
	Mike Galbraith <efault@....de>,
	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>,
	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 04:31 -0800, Paul Menage wrote:
> On Fri, Nov 19, 2010 at 3:49 AM, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> > It must be nice to be that ignorant ;-) Speaking for the scheduler
> > cgroup controller (that being the only one I actually know), most all
> > the load-balance operations are O(n) in the number of active cgroups,
> > and a lot of the cpu local schedule operations are O(d) where d is the
> > depth of the cgroup tree.
> 
> The same would apply to CPU autogroups, presumably?

Yep, they're not special at all... uses the same mechanism.
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