linux-kernel - Re: [RFC] respect the referenced bit of KVM guest pages?

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Message-ID: <4A79984C.2010508@redhat.com>
Date:	Wed, 05 Aug 2009 10:33:48 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Wu Fengguang <fengguang.wu@...el.com>,
	"Dike, Jeffrey G" <jeffrey.g.dike@...el.com>,
	"Yu, Wilfred" <wilfred.yu@...el.com>,
	"Kleen, Andi" <andi.kleen@...el.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Mel Gorman <mel@....ul.ie>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>, KVM list <kvm@...r.kernel.org>
Subject: Re: [RFC] respect the referenced bit of KVM guest pages?

Avi Kivity wrote:

> The attached patch implements this.

The attached page requires each page to go around twice
before it is evicted, but they will still get evicted in
the order in which they were made present.

FIFO page replacement was shown to be a bad idea in the
1960's and it is still a terrible idea today.

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