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	<20101013121829.c3320944.kamezawa.hiroyu@jp.fujitsu.com>
Date: Sun, 17 Oct 2010 13:05:22 +0900
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Subject: Re: [RFC][PATCH 3/3] alloc contig pages with migration.
From: Minchan Kim <minchan.kim@gmail.com>
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To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
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On Wed, Oct 13, 2010 at 12:18 PM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@jp.fujitsu.com> wrote:
> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
>
> Add an function to allocate contigous memory larger than MAX_ORDER.
> The main difference between usual page allocater is that this uses
> memory offline techiqueue (Isoalte pages and migrate remaining pages.).
>
> I think this is not 100% solution because we can't avoid fragmentation,
> but we have kernelcore=3D boot option and can create MOVABLE zone. That
> helps us to allow allocate a contigous range on demand.
>
> Maybe drivers can alloc contig pages by bootmem or hiding some memory
> from the kernel at boot. But if contig pages are necessary only in some
> situation, kernelcore=3D boot option and using page migration is a choice=