linux-kernel - Interleave policy on 2M pages (was Re: [RFC][BUGFIX][PATCH 1/2] memcg: fix charge bypass route of migration)

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Message-ID: <alpine.DEB.2.00.1004161111380.7710@router.home>
Date:	Fri, 16 Apr 2010 11:13:10 -0500 (CDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Andrea Arcangeli <aarcange@...hat.com>
cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>, Mel Gorman <mel@....ul.ie>,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Interleave policy on 2M pages (was Re: [RFC][BUGFIX][PATCH 1/2]
 memcg: fix charge bypass route of migration)

On Thu, 15 Apr 2010, Andrea Arcangeli wrote:

> 2) add alloc_pages_vma for numa awareness in the huge page faults

How do interleave policies work with alloc_pages_vma? So far the semantics
is to spread 4k pages over different nodes. With 2M pages this can no
longer work the way is was.

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