linux-kernel - Re: [PATCH 14/18] mm: numa: Limit scope of lock for NUMA migrate rate limiting

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Message-ID: <52A5F40F.40206@redhat.com>
Date:	Mon, 09 Dec 2013 11:47:11 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mgorman@...e.de>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Alex Thorlton <athorlton@....com>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 14/18] mm: numa: Limit scope of lock for NUMA migrate
 rate limiting

On 12/09/2013 02:09 AM, Mel Gorman wrote:
> NUMA migrate rate limiting protects a migration counter and window using
> a lock but in some cases this can be a contended lock. It is not
> critical that the number of pages be perfect, lost updates are
> acceptable. Reduce the importance of this lock.
> 
> Signed-off-by: Mel Gorman <mgorman@...e.de>

Reviewed-by: Rik van Riel <riel@...hat.com>


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