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

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Message-ID: <20090806092516.GA18425@localhost>
Date:	Thu, 6 Aug 2009 17:25:16 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Avi Kivity <avi@...hat.com>
Cc:	"Dike, Jeffrey G" <jeffrey.g.dike@...el.com>,
	Rik van Riel <riel@...hat.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>
Subject: Re: [RFC] respect the referenced bit of KVM guest pages?

On Thu, Aug 06, 2009 at 05:22:23PM +0800, Avi Kivity wrote:
> On 08/05/2009 10:18 PM, Dike, Jeffrey G wrote:
> >> How did you create that 128M memory compartment?
> >>
> >> Did you use cgroups on the host system?
> >>      
> >
> > Yup.
> >
> >    
> >> How much memory do you give your virtual machine?
> >>
> >> That is, how much memory does it think it has?
> >>      
> >
> > 256M.
> >    
> 
> So you're effectively running a 256M guest on a 128M host?
> 
> Do cgroups have private active/inactive lists?

Yes, and they reuse the same page reclaim routines with the global
LRU lists.
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