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

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Message-ID: <661de9470908311342gcdc3eb7v261951221212e549@mail.gmail.com>
Date:	Tue, 1 Sep 2009 02:12:44 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	"Dike, Jeffrey G" <jeffrey.g.dike@...el.com>
Cc:	Rik van Riel <riel@...hat.com>,
	"Wu, Fengguang" <fengguang.wu@...el.com>,
	Avi Kivity <avi@...hat.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	"Yu, Wilfred" <wilfred.yu@...el.com>,
	"Kleen, Andi" <andi.kleen@...el.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>
Subject: Re: [RFC] respect the referenced bit of KVM guest pages?

On Tue, Sep 1, 2009 at 1:41 AM, Dike, Jeffrey G<jeffrey.g.dike@...el.com> wrote:
>> Page discards by the host, which are invisible to the guest
>> OS.
>
> Duh.  Right - I can't keep my VM systems straight...
>

Sounds like we need a way of indicating reference information. Guest
page hinting (cough; cough) anyone? May be a simpler version?

Balbir Singh.
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