linux-kernel - Re: [PATCH 40/63] sched: numa: Favor placing a task on the preferred node

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Message-ID: <5253067A.2040607@redhat.com>
Date:	Mon, 07 Oct 2013 15:07:38 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mgorman@...e.de>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 40/63] sched: numa: Favor placing a task on the preferred
 node

On 10/07/2013 06:29 AM, Mel Gorman wrote:
> A tasks preferred node is selected based on the number of faults
> recorded for a node but the actual task_numa_migate() conducts a global
> search regardless of the preferred nid. This patch checks if the
> preferred nid has capacity and if so, searches for a CPU within that
> node. This avoids a global search when the preferred node is not
> overloaded.
> 
> Signed-off-by: Mel Gorman <mgorman@...e.de>

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

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