linux-kernel - Re: [PATCH -mm] do_migrate_pages() calls migrate_to_node() even if task is already on a correct node

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Message-ID: <4F74A344.7070805@redhat.com>
Date:	Thu, 29 Mar 2012 14:00:36 -0400
From:	Larry Woodman <lwoodman@...hat.com>
To:	Christoph Lameter <cl@...ux.com>
CC:	KOSAKI Motohiro <kosaki.motohiro@...il.com>, linux-mm@...ck.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Motohiro Kosaki <mkosaki@...hat.com>
Subject: Re: [PATCH -mm] do_migrate_pages() calls migrate_to_node() even if
 task is already on a correct node

On 03/22/2012 03:30 PM, Christoph Lameter wrote:
> On Thu, 22 Mar 2012, Larry Woodman wrote:
>
>>> Application may manage their locality given a range of nodes and each of
>>> the x .. x+n nodes has their particular purpose.
>> So to be clear on this, in that case the intention would be move 3 to 4, 4 to
>> 5 and 5 to 6
>> to keep the node ordering the same?
> Yup. Have a look at do_migrate_pages and the descrition in the comment by
> there by Paul Jackson.
>
>
Christoph and others what do you think about this???



View attachment "upstream-do_migrate_pages.patch" of type "text/plain" (703 bytes)