From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: with ECARTIS (v1.0.0; list xfs); Thu, 22 Mar 2007 10:41:49 -0700 (PDT) Received: from service.eng.exegy.net (68-191-203-42.static.stls.mo.charter.com [68.191.203.42]) by oss.sgi.com (8.12.10/8.12.10/SuSE Linux 0.7) with ESMTP id l2MHfi6p018498 for ; Thu, 22 Mar 2007 10:41:46 -0700 Message-ID: <4602BF9A.2080402@exegy.com> Date: Thu, 22 Mar 2007 12:40:42 -0500 From: "Mr. Berkley Shands" Content-Class: urn:content-classes:message MIME-Version: 1.0 Subject: 2.6.20 (+2.6.21-rc4) write hang modifier Content-Type: text/plain; charset="iso-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com List-Id: xfs To: linux-xfs@oss.sgi.com, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org Cc: Dave Lloyd If I set /proc/sys/vm/dirty_ratio to "5" the write lockup happens within the first MilliSecond, at about 100MB per file system. If I slew the dirty_ratio to 80, the lockup happens at about 2GB per file system. 2.6.21-rc4 has the same symptoms, and same lockups. It appears that mptsas is dropping something. berkley -- //E. F. Berkley Shands, MSc// **Exegy Inc.** 3668 S. Geyer Road, Suite 300 St. Louis, MO 63127 Direct: (314) 450-5348 Cell: (314) 303-2546 Office: (314) 450-5353 Fax: (314) 450-5354 The Usual Disclaimer follows... This e-mail and any documents accompanying it may contain legally privileged and/or confidential information belonging to Exegy, Inc. Such information may be protected from disclosure by law. The information is intended for use by only the addressee. If you are not the intended recipient, you are hereby notified that any disclosure or use of the information is strictly prohibited. If you have received this e-mail in error, please immediately contact the sender by e-mail or phone regarding instructions for return or destruction and do not use or disclose the content to others.