linux-kernel - Re: [PATCH 03/10] mm, page_alloc: Remove unnecessary taking of a seqlock when cpusets are disabled

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Message-ID: <20150924200627.GG3009@cmpxchg.org>
Date:	Thu, 24 Sep 2015 16:06:27 -0400
From:	Johannes Weiner <hannes@...xchg.org>
To:	Mel Gorman <mgorman@...hsingularity.net>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Michal Hocko <mhocko@...nel.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 03/10] mm, page_alloc: Remove unnecessary taking of a
 seqlock when cpusets are disabled

On Mon, Sep 21, 2015 at 11:52:35AM +0100, Mel Gorman wrote:
> There is a seqcounter that protects against spurious allocation failures
> when a task is changing the allowed nodes in a cpuset. There is no need
> to check the seqcounter until a cpuset exists.
> 
> Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>
> Acked-by: Christoph Lameter <cl@...ux.com>
> Acked-by: David Rientjes <rientjes@...gle.com>
> Acked-by: Vlastimil Babka <vbabka@...e.cz>
> Acked-by: Michal Hocko <mhocko@...e.com>

Acked-by: Johannes Weiner <hannes@...xchg.org>
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