From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263997AbTICQSg (ORCPT ); Wed, 3 Sep 2003 12:18:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263980AbTICQRn (ORCPT ); Wed, 3 Sep 2003 12:17:43 -0400 Received: from juniper.cant.ac.uk ([194.66.208.102]:14310 "EHLO juniper.canterbury.ac.uk") by vger.kernel.org with ESMTP id S263896AbTICQRC (ORCPT ); Wed, 3 Sep 2003 12:17:02 -0400 Subject: Kernel 2.4: Load average scaling to 200! From: James Vanns To: linux-kernel@vger.kernel.org Content-Type: text/plain Organization: Canterbury Christ Church University College Message-Id: <1062605821.23773.15.camel@eeyore.ntnet.cc.local> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.4 Date: Wed, 03 Sep 2003 17:17:01 +0100 Content-Transfer-Encoding: 7bit X-Time-on-queue: 0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org All, As I am not sure whether this problem lies with the kernel core (process scheduler, context switching etc. and all that other stuff that flies over my head!), a scsi driver or the scsi tape driver or the 'mt' command itself I have copied the kernel mailing list in this E-mail. When using mt on RedHat Linux 8 running kernel 2.4.20 to fsf on an LTO tape drive the load average soars to 100+ and denies everyone the mail service it's used for (IMAP). I have to reboot the server as I cannot kill mt. Has anyone had this kind of problem before? Any ideas if this is kernel related (sorry to waste time if you are sure it's not)? I have looked into mt's history to find no such bug report before. Regards James Vanns -- James Vanns BSc (Hons) MCP Linux Systems Administrator Senior Software Engineer (Linux / C & C++) Canterbury Christ Church University College Public Key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x24045370