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Date: Mon, 31 Aug 2009 15:52:55 -0400
From: Rik van Riel <riel@redhat.com>
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To: "Dike, Jeffrey G" <jeffrey.g.dike@intel.com>
CC: "balbir@linux.vnet.ibm.com" <balbir@linux.vnet.ibm.com>,
       "Wu, Fengguang" <fengguang.wu@intel.com>, Avi Kivity <avi@redhat.com>,
       Andrea Arcangeli <aarcange@redhat.com>,
       "Yu, Wilfred" <wilfred.yu@intel.com>,
       "Kleen, Andi" <andi.kleen@intel.com>,
       Hugh Dickins <hugh.dickins@tiscali.co.uk>,
       Andrew Morton <akpm@linux-foundation.org>,
       Christoph Lameter <cl@linux-foundation.org>,
       KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       Mel Gorman <mel@csn.ul.ie>, LKML <linux-kernel@vger.kernel.org>,
       linux-mm <linux-mm@kvack.org>
Subject: Re: [RFC] respect the referenced bit of KVM guest pages?
References: <4A7AAE07.1010202@redhat.com> <20090806102057.GQ23385@random.random> <20090806105932.GA1569@localhost> <4A7AC201.4010202@redhat.com> <20090806130631.GB6162@localhost> <4A7AD79E.4020604@redhat.com> <20090816032822.GB6888@localhost> <4A878377.70502@redhat.com> <20090816045522.GA13740@localhost> <9EECC02A4CC333418C00A85D21E89326B6611F25@azsmsx502.amr.corp.intel.com> <20090821182439.GN29572@balbir.in.ibm.com> <9EECC02A4CC333418C00A85D21E8932601841832F9@azsmsx502.amr.corp.intel.com>
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Dike, Jeffrey G wrote:
>> What do the stats for / from within kvm look like?
> 
> Interesting - what they look like is inactive_anon is always zero.

This will be because the VM does not start aging pages
from the active to the inactive list unless there is
some memory pressure.