linux-kernel - Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2

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Message-Id: <1173728208.5061.3.camel@lappy>
Date:	Mon, 12 Mar 2007 20:36:48 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Mike Galbraith <efault@....de>, Con Kolivas <kernel@...ivas.org>,
	Ingo Molnar <mingo@...e.hu>,
	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	ck list <ck@....kolivas.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2

On Mon, 2007-03-12 at 08:26 -0700, Linus Torvalds wrote:

> So "good fairness" really should involve some notion of "work done for 
> others". It's just not very easy to do..

A solution that is already in demand is a class based scheduler, where
the thread doing work for a client (temp.) joins the class of the
client.

The in-kernel virtualization guys also want to have this, for pretty
much the same reasons.

Peter

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