linux-kernel - Re: [patch] CFS (Completely Fair Scheduler), v2

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Message-ID: <20070417095303.GA25553@elte.hu>
Date:	Tue, 17 Apr 2007 11:53:03 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Williams <pwil3058@...pond.net.au>
Cc:	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Con Kolivas <kernel@...ivas.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>, caglar@...dus.org.tr,
	Willy Tarreau <w@....eu>,
	Gene Heskett <gene.heskett@...il.com>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>
Subject: Re: [patch] CFS (Completely Fair Scheduler), v2


* Peter Williams <pwil3058@...pond.net.au> wrote:

> Have you considered using rq->raw_weighted_load instead of 
> rq->nr_running in calculating fair_clock?  This would take the nice 
> value (or RT priority) of the other tasks into account when 
> determining what's fair.
> 
> Peter

> PS You'd have to change the migration thread's load_weight from 0 to 1 
> in order to prevent divide by zero without having to explicitly check 
> for it every time.

yeah - nice idea, i'll try this.

	Ingo
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