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: <40300.1332445016@turing-police.cc.vt.edu>
Date:	Thu, 22 Mar 2012 15:36:56 -0400
From:	Valdis.Kletnieks@...edu
To:	lwoodman@...hat.com
Cc:	Christoph Lameter <cl@...ux.com>,
	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 Thu, 22 Mar 2012 15:07:00 -0400, Larry Woodman said:

> 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?

Would it make more sense to do 5->6, 4->5, 3->4?  If we move stuff
from 3 to 4 before clearing the old 4 stuff out, it might get crowded?


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