linux-kernel - Re: [PATCH v8 3/6] MCS Lock: optimizations and extra comments

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Message-ID: <1390325511.3138.42.camel@schen9-DESK>
Date:	Tue, 21 Jan 2014 09:31:51 -0800
From:	Tim Chen <tim.c.chen@...ux.intel.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Paul E.McKenney" <paulmck@...ux.vnet.ibm.com>,
	Will Deacon <will.deacon@....com>,
	linux-kernel@...r.kernel.org, linux-mm <linux-mm@...ck.org>,
	linux-arch@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Waiman Long <waiman.long@...com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Alex Shi <alex.shi@...aro.org>,
	Andi Kleen <andi@...stfloor.org>,
	Michel Lespinasse <walken@...gle.com>,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	Matthew R Wilcox <matthew.r.wilcox@...el.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Rik van Riel <riel@...hat.com>,
	Peter Hurley <peter@...leysoftware.com>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	George Spelvin <linux@...izon.com>,
	"H. Peter Anvin" <hpa@...or.com>, Arnd Bergmann <arnd@...db.de>,
	Aswin Chandramouleeswaran <aswin@...com>,
	Scott J Norton <scott.norton@...com>,
	"Figo.zhang" <figo1802@...il.com>
Subject: Re: [PATCH v8 3/6] MCS Lock: optimizations and extra comments

On Tue, 2014-01-21 at 11:26 +0100, Peter Zijlstra wrote:
> On Mon, Jan 20, 2014 at 05:24:28PM -0800, Tim Chen wrote:
> > From: Jason Low <jason.low2@...com>
> > 
> > Remove unnecessary operation to assign locked status to 1 if lock is
> > acquired without contention as this value will not be checked by lock
> > holder again and other potential lock contenders will not be looking at
> > their own lock status.
should be "lock contenders will not be looking at lock holder's 
lock status"

Thanks for catching it.

Tim
> 
> Ha, read that again :-)
> 
> 


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