linux-kernel - Re: [PATCH -v9][RFC] mutex: implement adaptive spinning

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Message-ID: <alpine.LFD.2.00.0901131038260.6528@localhost.localdomain>
Date:	Tue, 13 Jan 2009 10:40:10 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Peter Zijlstra <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Gregory Haskins <ghaskins@...ell.com>,
	Matthew Wilcox <matthew@....cx>,
	Andi Kleen <andi@...stfloor.org>,
	Chris Mason <chris.mason@...cle.com>,
	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>
Subject: Re: [PATCH -v9][RFC] mutex: implement adaptive spinning



On Tue, 13 Jan 2009, Ingo Molnar wrote:
> 
> below is the v8 -> v10 delta patch - for all who'd like to review the 
> changes.

Hmm. This does seem to indicate that v10 lost many of the preempt changes. 
Probably because Peter went back to v7 to create it.

I also wonder about the timing numbers - the numbers were probably done 
with some random version and then not re-done, so the commit message is 
not necessarily "sane" in that respect - the timings quoted don't 
necessarily match the code committed.

		Linus
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