linux-kernel - Re: [PATCH 1/4] mm: introduce compaction and migration for virtio ballooned pages

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Date:	Tue, 26 Jun 2012 09:17:43 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Rafael Aquini <aquini@...hat.com>
CC:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	"Michael S. Tsirkin" <mst@...hat.com>
Subject: Re: [PATCH 1/4] mm: introduce compaction and migration for virtio
 ballooned pages

On 06/25/2012 07:25 PM, Rafael Aquini wrote:
> This patch introduces helper functions that teach compaction and migration bits
> how to cope with pages which are part of a guest memory balloon, in order to
> make them movable by memory compaction procedures.
>
> Signed-off-by: Rafael Aquini<aquini@...hat.com>

The function fill_balloon in drivers/virtio/virtio_balloon.c
should probably add __GFP_MOVABLE to the gfp mask for alloc_pages,
to keep the pageblock where balloon pages are allocated marked
as movable.

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