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

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Message-ID: <20070425082247.GA21546@elte.hu>
Date:	Wed, 25 Apr 2007 10:22:47 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Pavel Machek <pavel@....cz>
Cc:	Mark Lord <lkml@....ca>, 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


* Pavel Machek <pavel@....cz> wrote:

> > 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.)
> 
> X is priviledged. It can just cli around the critical section.

yes, that is a tool that can be used too (and is used by most drivers) - 
my point was rather that besides the disadvantages, not preempting X can 
be an advantage too - not that there are no other (and often more 
suitable) tools to do the same.

	Ingo
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