From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 1 Apr 2003 07:32:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 1 Apr 2003 07:32:49 -0500 Received: from platane.lps.ens.fr ([129.199.121.28]:15750 "EHLO platane.lps.ens.fr") by vger.kernel.org with ESMTP id ; Tue, 1 Apr 2003 07:32:48 -0500 Date: Tue, 1 Apr 2003 14:44:04 +0200 From: Eric Brunet To: linux-kernel@vger.kernel.org Subject: Re: 845GE Chipset severe performance problems Message-ID: <20030401124404.GA26931@lps.ens.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit User-Agent: Mutt/1.3.25i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org In-Reply-To: <1049039985.14686.11.camel@dhcp22.swansea.linux.org.uk> References: <188481168784.20030329130300@btinternet.com> <1048949147.6725.3.camel@dhcp22.swansea.linux.org.uk> <153495685337.20030329170457@btinternet.com> <1049039985.14686.11.camel@dhcp22.swansea.linux.org.uk> As there is this thread about mtrr on Intel chipsets, I have some messages in the log about mtrr, and I don't know whether they are harmless warnings or errors that should be reported. My computer is a 2.4 GhZ Pentium IV with an intel i845G/GL chipset. Motherboard and bios by shuttle. $ cat /proc/mtrr reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1 reg01: base=0x1f800000 ( 504MB), size= 8MB: uncachable, count=1 reg02: base=0xe0000000 (3584MB), size= 128MB: write-combining, count=2 I have 512 MB of memory, the motherboard doesn't support more than 2GB and I don't see what is this range over 3.5 GB. Also, the two first overlaping ranges look suspicious. I have the following error/warning messages in the log: * with kernel 2.4.21pre3 (+ acpi patches) mtrr: base(0xe0020000) is not aligned on a size(0x800000) boundary (this happens just after initializing drm) * with kernel 2.5.63 (+ acpi patches) mtrr: MTRR 2 not used (this happens once or twice during each sutdown. Note that I don't have drm with kernel 2.5.x, so I don't know if the first message is really gone) So... Is this situation normal ? Éric Brunet