linux-kernel - Re: [git pull] scheduler fixes

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Message-ID: <20080511140017.GA2457@elte.hu>
Date:	Sun, 11 May 2008 16:00:17 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Sven Wegener <sven.wegener@...aler.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Alexander Viro <viro@....linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [git pull] scheduler fixes


* Matthew Wilcox <matthew@....cx> wrote:

> Current XFS CVS has a fix from myself and Christoph that gets rid of 
> the l_flushsema and replaces it with a staggered wakeup of each task 
> that's waiting as the previously woken task clears the critical 
> section.

the solution is to reduce semaphore usage by converting them to mutexes. 
Is anyone working on removing legacy semaphore use from XFS?

	Ingo
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