From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265442AbTLHPgx (ORCPT ); Mon, 8 Dec 2003 10:36:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265424AbTLHPgx (ORCPT ); Mon, 8 Dec 2003 10:36:53 -0500 Received: from holomorphy.com ([199.26.172.102]:39643 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S265440AbTLHPgt (ORCPT ); Mon, 8 Dec 2003 10:36:49 -0500 Date: Mon, 8 Dec 2003 07:36:41 -0800 From: William Lee Irwin III To: Per Buer Cc: linux-kernel@vger.kernel.org Subject: Re: 2.4: mylex and > 2GB RAM Message-ID: <20031208153641.GJ8039@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Per Buer , linux-kernel@vger.kernel.org References: <1070897058.25490.56.camel@netstat.linpro.no> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1070897058.25490.56.camel@netstat.linpro.no> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 08, 2003 at 04:24:19PM +0100, Per Buer wrote: > I have an Supermicro Superserver (wow!) 8040 or 8060 with a two Intel > Xeon (p3-based with 1MB cache) and a Mylex AcceleRAID 352. We recently > upgraded from 2 to 4GB of memory. > There seems to a problem with IO and high memory. Suddenly IO > performance will degrade dramatically (throughput of about 50KB/s). > Booting the machine with "mem=2048" remedies this. > We have tried replacing the memory with another make - no luck. > Any hints? Could you send out a dmesg and a config file? -- wli