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Date: Sun, 11 May 2008 16:00:17 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Matthew Wilcox <matthew@wil.cx>
Cc: Sven Wegener <sven.wegener@stealer.net>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
       Andi Kleen <andi@firstfloor.org>, LKML <linux-kernel@vger.kernel.org>,
       Alexander Viro <viro@ftp.linux.org.uk>,
       Andrew Morton <akpm@linux-foundation.org>,
       Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [git pull] scheduler fixes
Message-ID: <20080511140017.GA2457@elte.hu>
References: <20080508120130.GA2860@elte.hu> <20080508122802.GA4880@elte.hu> <20080508144316.GA9869@elte.hu> <20080508151028.GA12109@elte.hu> <20080511110306.GP19219@parisc-linux.org> <20080511114803.GA8289@parisc-linux.org> <20080511125049.GA22513@elte.hu> <20080511125216.GA25040@elte.hu> <20080511130226.GR19219@parisc-linux.org> <20080511132636.GA22878@parisc-linux.org>
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* Matthew Wilcox <matthew@wil.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