linux-kernel - Re: [GIT PULL] adaptive spinning mutexes

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Message-ID: <20090115220357.GB4314@elte.hu>
Date:	Thu, 15 Jan 2009 23:03:57 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Chris Mason <chris.mason@...cle.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Matthew Wilcox <matthew@....cx>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Gregory Haskins <ghaskins@...ell.com>,
	Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-btrfs <linux-btrfs@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Nick Piggin <npiggin@...e.de>,
	Peter Morreale <pmorreale@...ell.com>,
	Sven Dietrich <SDietrich@...ell.com>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [GIT PULL] adaptive spinning mutexes


* Chris Mason <chris.mason@...cle.com> wrote:

> [ re: pipes, ok I don't know of realistic pipe benchmarks but I'll run 
> them if people can suggest one ]

Threaded servers making heavy use of sys_splice() ought to hit the pipe 
mutex all the time.

	Ingo
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