From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755123Ab1GEXde (ORCPT ); Tue, 5 Jul 2011 19:33:34 -0400 Received: from lennier.cc.vt.edu ([198.82.162.213]:35912 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752036Ab1GEXdd (ORCPT ); Tue, 5 Jul 2011 19:33:33 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.3-dev To: Ankita Garg Cc: linux-mm@kvack.org, svaidy@linux.vnet.ibm.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/5] mm,debug: VM framework to capture memory reference pattern In-Reply-To: Your message of "Tue, 05 Jul 2011 13:52:34 +0530." <1309854159-8277-1-git-send-email-ankita@in.ibm.com> From: Valdis.Kletnieks@vt.edu References: <1309854159-8277-1-git-send-email-ankita@in.ibm.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1309908804_18528P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Tue, 05 Jul 2011 19:33:24 -0400 Message-ID: <64797.1309908804@turing-police.cc.vt.edu> X-Mirapoint-Received-SPF: 198.82.161.152 auth3.smtp.vt.edu Valdis.Kletnieks@vt.edu 2 pass X-Junkmail-Info: (0) X-Junkmail-Status: score=10/50, host=steiner.cc.vt.edu X-Junkmail-Signature-Raw: score=unknown, refid=str=0001.0A020204.4E139F47.002E,ss=1,fgs=0, ip=0.0.0.0, so=2010-07-22 22:03:31, dmn=2009-09-10 00:05:08, mode=multiengine X-Junkmail-IWF: false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1309908804_18528P Content-Type: text/plain; charset=us-ascii On Tue, 05 Jul 2011 13:52:34 +0530, Ankita Garg said: > by default) and scans through all pages of the specified tasks (including > children/threads) running in the system. If the hardware reference bit in the > page table is set, then the page is marked as accessed over the last sampling > interval and the reference bit is cleared. Does that cause any issues for other code in the mm subsystem that was expecting to use the reference bit for something useful? (Similarly, if other code in mm turns that bit *off* for its own reasons, does your code still produce useful results?) --==_Exmh_1309908804_18528P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFOE59EcC3lWbTT17ARAgICAJ0eK8nvfFWBX/my5unboxcW+kwR1wCfe09X iuBPwUv3052e06A6+wQsgOk= =/A6K -----END PGP SIGNATURE----- --==_Exmh_1309908804_18528P--