linux-kernel - Re: [PATCH][RFC]: mutex: adaptive spin

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Message-ID: <20090107133540.GS2002@parisc-linux.org>
Date:	Wed, 7 Jan 2009 06:35:40 -0700
From:	Matthew Wilcox <matthew@....cx>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	paulmck@...ux.vnet.ibm.com, Gregory Haskins <ghaskins@...ell.com>,
	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	Chris Mason <chris.mason@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-btrfs <linux-btrfs@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Nick Piggin <npiggin@...e.de>,
	Peter Morreale <pmorreale@...ell.com>,
	Sven Dietrich <SDietrich@...ell.com>
Subject: Re: [PATCH][RFC]: mutex: adaptive spin

On Wed, Jan 07, 2009 at 03:34:47PM +0800, Lai Jiangshan wrote:
> So I think current task should sleep earlier when it detects that
> mutex owner start schedule().

How do you propose it detects this?

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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