From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267480AbUHPJOg (ORCPT ); Mon, 16 Aug 2004 05:14:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267487AbUHPJOg (ORCPT ); Mon, 16 Aug 2004 05:14:36 -0400 Received: from mailr.eris.qinetiq.com ([128.98.1.9]:23950 "HELO qinetiq-tim.net") by vger.kernel.org with SMTP id S267480AbUHPJOe convert rfc822-to-8bit (ORCPT ); Mon, 16 Aug 2004 05:14:34 -0400 From: Mark Watts Organization: QinetiQ To: linux-kernel@vger.kernel.org Subject: Re: High CPU usage (up to server hang) under heavy I/O load Date: Mon, 16 Aug 2004 10:13:13 +0100 User-Agent: KMail/1.6.1 Cc: Alan Cox References: <20040813140229.4F48B2FC2C@illicom.com> <1092435364.24960.35.camel@localhost.localdomain> In-Reply-To: <1092435364.24960.35.camel@localhost.localdomain> MIME-Version: 1.0 Content-Disposition: inline Content-Type: Text/Plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Message-Id: <200408161013.13829.m.watts@eris.qinetiq.com> X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.27.0.4; VDF: 6.27.0.11; host: mailr.qinetiq-tim.net) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > Is your raid controller 64bit capable ? If you can I'd also go to a 2.6 > kernel for anything > 1Gb, and definitely > 4Gb of RAM. The differences > are astounding although if your PCI I/O hardware cant do 64bit access > your box will suck whatever kernel 8) Would this also mean that if I stick a 64bit SATA raid card (a 3Ware 8506-4LP in this case) into a 32bit pci slot, then I/O is always going to suck badly? ... cos I do, and I/O sucks :) Mark. - -- Mark Watts Senior Systems Engineer QinetiQ Trusted Information Management Trusted Solutions and Services group GPG Public Key ID: 455420ED -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFBIHqpBn4EFUVUIO0RAr4HAKCXDnm8YM2f7jY9awix/0KVyoUvYwCeJdmU +gatlxR+IHurHnTPXDDITqk= =2Rrq -----END PGP SIGNATURE-----