linux-kernel - Re: [PATCH] 2.6.23-rc6: Fix NUMA Memory Policy Reference Counting

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Message-Id: <200709180025.40837.ak@suse.de>
Date:	Tue, 18 Sep 2007 00:25:40 +0200
From:	Andi Kleen <ak@...e.de>
To:	Christoph Lameter <clameter@....com>
Cc:	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org, eric.whitney@...com,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH]  2.6.23-rc6:  Fix NUMA Memory Policy Reference Counting


> The patch does require concurrent increments and decrements in the main 
> fault patch. The potential is to create another bouncing cacheline for 
> concurrent faults. This looks like it would cause a performance issue.

While may be true correctness is always more important than performance.
So I think this is the right thing for .23. Any performance improvements
if needed can come later.

-Andi
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