linux-kernel - Re: [REPORT] cfs-v4 vs sd-0.44

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Date:	Sun, 22 Apr 2007 09:30:34 -0400
From:	Mark Lord <lkml@....ca>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Jan Engelhardt <jengelh@...ux01.gwdg.de>,
	Con Kolivas <kernel@...ivas.org>, Willy Tarreau <w@....eu>,
	William Lee Irwin III <wli@...omorphy.com>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Peter Williams <pwil3058@...pond.net.au>,
	Thomas Gleixner <tglx@...utronix.de>, caglar@...dus.org.tr,
	Gene Heskett <gene.heskett@...il.com>
Subject: Re: [REPORT] cfs-v4 vs sd-0.44

Ingo Molnar wrote:
>
> well, i just simulated a runaway X at nice -19 on CFS (on a UP box), and 
> while the box was a tad laggy, i was able to killall it without 
> problems, within 2 seconds that also included a 'su'. So it's not an 
> issue in CFS, it can be turned off, and because every distro has another 
> way to renice Xorg, this is a convenience hack until Xorg standardizes 
> it into some xorg.conf field. (It also makes sure that X isnt preempted 
> by other userspace stuff while it does timing-sensitive operations like 
> setting the video modes up or switching video modes, etc.)

Good!
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