linux-kernel - Re: [regression, 3.16-rc] rwsem: optimistic spinning causing performance degradation

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Message-ID: <20140715021732.GI22339@dastard>
Date:	Tue, 15 Jul 2014 12:17:32 +1000
From:	Dave Chinner <david@...morbit.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Xie Miao <miaoxie1984@...il.com>, Jason Low <jason.low2@...com>,
	Davidlohr Bueso <davidlohr@...com>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	miaox@...fujitsu.com
Subject: Re: [regression, 3.16-rc] rwsem: optimistic spinning causing
 performance degradation

On Mon, Jul 14, 2014 at 11:55:39AM +0200, Peter Zijlstra wrote:
> On Mon, Jul 14, 2014 at 05:37:13PM +0800, Xie Miao wrote:
> > Hi, Jason
> > 
> > Could you re-sent this patch? Because it seems it is ignored.
> 
> Its not ignored; its not merged because of unrelated stability issues.

Is it going to be merged? If not, can you please revert the
optimistic spinning patch that caused the regression?

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
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