From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757457AbXFUT1Q (ORCPT ); Thu, 21 Jun 2007 15:27:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753405AbXFUT1D (ORCPT ); Thu, 21 Jun 2007 15:27:03 -0400 Received: from terminus.zytor.com ([192.83.249.54]:48122 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753342AbXFUT1B (ORCPT ); Thu, 21 Jun 2007 15:27:01 -0400 Message-ID: <467AD101.4020107@zytor.com> Date: Thu, 21 Jun 2007 12:26:57 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.0 (X11/20070419) MIME-Version: 1.0 To: Peter Rabbitson CC: linux-kernel@vger.kernel.org Subject: Re: Terrible IO performance when using 4GB of RAM on a 32 bit machine References: <467AB4CF.7030904@rabbit.us> In-Reply-To: <467AB4CF.7030904@rabbit.us> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Peter Rabbitson wrote: > > I have captured dmesg output without mem[5], with mem=3900M[6] and > mem=2048M[7]. > What does /proc/mtrr look like in the two cases? -hpa