From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751552AbZHaUu4 (ORCPT ); Mon, 31 Aug 2009 16:50:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751427AbZHaUuz (ORCPT ); Mon, 31 Aug 2009 16:50:55 -0400 Received: from mail-px0-f189.google.com ([209.85.216.189]:65227 "EHLO mail-px0-f189.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751249AbZHaUuy convert rfc822-to-8bit (ORCPT ); Mon, 31 Aug 2009 16:50:54 -0400 X-Greylist: delayed 492 seconds by postgrey-1.27 at vger.kernel.org; Mon, 31 Aug 2009 16:50:54 EDT DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=OPYrP4sfaDXc3Fof9+FnjL9fqRlb1oMAtqX8/tQ76fVEqcTIwRF6bPZ/zVskkEiK/i bollI8TZLWSsqohdbnRe+37cPjh7PXDWTMlVBnoRRrCVkoTnlrruUcfUhS+UvqtfEA5P 5fM7bq70lvid2hACtiZoaUDM0S7cHofuMjY5s= MIME-Version: 1.0 In-Reply-To: <9EECC02A4CC333418C00A85D21E893260184183346@azsmsx502.amr.corp.intel.com> References: <4A7AAE07.1010202@redhat.com> <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> <4A9C2A17.3080802@redhat.com> <9EECC02A4CC333418C00A85D21E893260184183339@azsmsx502.amr.corp.intel.com> <4A9C2E01.7080707@redhat.com> <9EECC02A4CC333418C00A85D21E893260184183346@azsmsx502.amr.corp.intel.com> Date: Tue, 1 Sep 2009 02:12:44 +0530 X-Google-Sender-Auth: 88d93b284758f637 Message-ID: <661de9470908311342gcdc3eb7v261951221212e549@mail.gmail.com> Subject: Re: [RFC] respect the referenced bit of KVM guest pages? From: Balbir Singh To: "Dike, Jeffrey G" Cc: Rik van Riel , "Wu, Fengguang" , Avi Kivity , Andrea Arcangeli , "Yu, Wilfred" , "Kleen, Andi" , Hugh Dickins , Andrew Morton , Christoph Lameter , KOSAKI Motohiro , Mel Gorman , LKML , linux-mm Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 1, 2009 at 1:41 AM, Dike, Jeffrey G 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.