From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756330AbYEDJEw (ORCPT ); Sun, 4 May 2008 05:04:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753970AbYEDJEo (ORCPT ); Sun, 4 May 2008 05:04:44 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:41791 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753271AbYEDJEn (ORCPT ); Sun, 4 May 2008 05:04:43 -0400 Date: Sun, 4 May 2008 11:04:29 +0200 From: Ingo Molnar To: Frans Pop Cc: Jesse Barnes , "Pallipadi, Venkatesh" , linux-kernel@vger.kernel.org, "Packard, Keith" , Arjan van de Ven , Thomas Gleixner , "H. Peter Anvin" Subject: Re: [git head] Should X86_PAT really default to yes? Message-ID: <20080504090429.GC29318@elte.hu> References: <200805022122.03576.elendil@planet.nl> <924EFEDD5F540B4284297C4DC59F3DEEFB8D3D@orsmsx423.amr.corp.intel.com> <200805021340.24987.jesse.barnes@intel.com> <200805040910.57088.elendil@planet.nl> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200805040910.57088.elendil@planet.nl> User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Frans Pop wrote: > On Friday 02 May 2008, Jesse Barnes wrote: > > This is just a transient issue during VT switch or server exit though, > > right? X functionality isn't affected, and your VTs work fine? > > Transient only. I've just tested again and this time the band was > visible on top of the text on VT1 for about 2 seconds. Then it > disappeared. The artifacts also appear when I log out from KDE (i.e. > without exiting the server), and I also get the messages when logging > out and logging in again. > > I do not see any performance issues, but I've only used this kernel > for a very short time. > > > If so, it might not be a PAT issue but just a different memory > > layout or something (and therefore it would really just be a > > cosmetic bug in the X driver). > > The artifacts may not be a PAT issue directly, but it is a clear > regression for me as I currently have a nice clean screen when X shuts > down. I'm also 100% sure that it is caused by enabling PAT. A kernel > with same config and only PAT disabled does not show the artifacts. ok, Cc:-ed more folks - this bug has to be resolved regardless of the default selection. Ingo