From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262935AbVAQWaG (ORCPT ); Mon, 17 Jan 2005 17:30:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262945AbVAQWZE (ORCPT ); Mon, 17 Jan 2005 17:25:04 -0500 Received: from [81.2.110.250] ([81.2.110.250]:9098 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S262935AbVAQWEs (ORCPT ); Mon, 17 Jan 2005 17:04:48 -0500 Subject: Re: [UPDATE] Severe performance problems with kernel 2.6.10 From: Alan Cox To: Gabriel Tataranu Cc: Linux Kernel Mailing List In-Reply-To: <41EC1721.8080405@belent.com> References: <41EC1721.8080405@belent.com> Content-Type: text/plain Content-Transfer-Encoding: 7bit Message-Id: <1105995611.16119.16.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 (1.4.6-2) Date: Mon, 17 Jan 2005 21:00:15 +0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Llu, 2005-01-17 at 19:50, Gabriel Tataranu wrote: > For those interested: > > The performance issues (below) where due to a strange bug in the kernel > VM triggered by the motherboard BIOS. This affects Asus P4P800 > motherboards(-MX and -VM tested) with more that 1 GB RAM. The built-in > VGA can use 1-32 MB RAM for display but configured with less than 16 MB > of video RAM the board will behave EXTREMELY poor in linux (2.6.9 also > tested to behave like this). I'll take a guess. Can you send me the boot dmesg and /proc/mtrr of both the slow and the normal cases. I think I know what the BIOS is doing and I've been looking for a system doing this so I can find a vict^H^H^Holunteer to test some ideas out. Alan