linux-kernel - Re: [patch 0/6] Guest page hinting version 7.

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Message-ID: <49D11287.4030307@redhat.com>
Date:	Mon, 30 Mar 2009 14:42:15 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>, akpm@...l.org,
	nickpiggin@...oo.com.au, frankeh@...son.ibm.com,
	virtualization@...ts.osdl.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, hugh@...itas.com
Subject: Re: [patch 0/6] Guest page hinting version 7.

Jeremy Fitzhardinge wrote:

> That said, people have been looking at tracking block IO to work out 
> when it might be useful to try and share pages between guests under Xen.

Tracking block IO seems like a bass-ackwards way to figure
out what the contents of a memory page are.

The KVM KSM code has a simpler, yet still efficient, way of
figuring out which memory pages can be shared.

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