TITLE: HP Tru64 UNIX - 5.1B-4 a_lock timeout panic Copyright (c) Hewlett-Packard Company 2007. All rights reserved. PRODUCT: HP Tru64 UNIX [R] V5.1B-4 SOURCE: Hewlett-Packard Company ECO INFORMATION: ECO Name: T64KIT1001176-V51BB27-E-20070328 ECO Kit Approximate Size: 4.91MB Kit Applies To: HP Tru64 UNIX V5.1B-4 PK6 (BL27) ECO Kit CHECKSUMS: /usr/bin/sum results: 55147 5030 /usr/bin/cksum results: 3826504712 5150720 MD5 results: 84a1e2d2e09a87742705e65526286b9b SHA1 results: 1ab71a2c8084f21fe9985809820f6248e95278be ECO KIT SUMMARY: A dupatch-based, Early Release Patch kit exists for HP Tru64 UNIX V5.1B-4 that contains solutions to the following problem(s): HP Tru64 UNIX v 5.1B-4 systems have been experiencing a panic with the panic string "a_lock timeout." The problem was caused by a thread being preempted while holding a simple lock. This caused other threads waiting for the lock to timeout and panic. The solution is to release the lock before preemption, and then reacquire the lock and re-evaluate context upon continuing. The Patch Kit Installation Instructions and the Patch Summary and Release Notes documents provide patch kit installation and removal instructions and a summary of each patch. Please read these documents prior to installing patches on your system. The patches in this ERP kit will also be available in the next mainstream patch kit - HP Tru64 UNIX V5.1B-5. INSTALLATION NOTES: 1) Install this kit with the dupatch utility that is included in the patch kit. You may need to baseline your system if you have manually changed system files on your system. The dupatch utility provides the baselining capability. 2) The patch in this ERP kit does not have any file intersections with any other ERP available at this time for this product version. 3) This ERP kit will NOT install over any Customer Specific Patches (CSPs) which have file intersections with this ERP kit. Contact your normal Service Provider for assistance if the installation of this ERP kit is blocked by any of your installed CSPs. INSTALLATION PREREQUISITES: You must have installed HP Tru64 UNIX V5.1B-4 PK6 (BL27) prior to installing this Early Release Patch Kit. SUPERSEDE INFORMATION: None KNOWN PROBLEMS WITH THE PATCH KIT: None. RELEASE NOTES FOR T64KIT1001176-V51BB27-E-20070328: Release Notes This document summarizes the contents and special instructions for the Tru64 UNIX V5.1B patches contained in this kit. For information about installing or removing patches, baselining, and general patch management, see the Patch Kit Installation Instructions document. 1 Release Notes This Early Release Patch Kit Distribution contains: - fixes that resolve the problem(s) reported in: o 20084 20092 20125 20130 20135 QXCM1000396465 QXCM1000398334 QXCM1000403330 QXCM1000405670 QXCM1000406227 QXCM1000407727 QXCM1000409079 QXCM1000410520 * for Tru64 UNIX V5.1B OSF540.ReleaseNotes.tar (BL27) * for Tru64 UNIX V5.1B T64V51BB27AS0006-20061208.tar (BL27) This kit includes a patch which requires system reboot. The patches in this kit are being released early for general customer use. Refer to the Release Notes for a summary of each patch and installation prerequisites. Patches in this kit are installed by running dupatch from the directory in which the kit was untarred. For example, as root on the target system: > mkdir -p /tmp/CSPkit1 > cd /tmp/CSPkit1 > > tar -xpvf DUV40D13-C0044900-1285-20000328.tar > cd patch_kit > ./dupatch 2 Special Instructions SPECIAL INSTRUCTIONS for Tru64 UNIX V5.1B Patch C2070.00 3 Summary of CSPatches contained in this kit Tru64 UNIX V5.1B PatchId Summary Of Fix ---------------------------------------- C2070.00 Fixes a locking problem in anon_cow_fault 4 Additional information from Engineering None 5 Affected system files This patch delivers the following files: Tru64 UNIX V5.1B Patch C2070.00 ./sys/BINARY/vm.mod CHECKSUM: 11123 675 SUBSET: OSFBIN540 [R] UNIX is a registered trademark in the United States and other countries licensed exclusively through X/Open Company Limited. Copyright Hewlett-Packard Company 2007. All Rights reserved. This software is proprietary to and embodies the confidential technology of Hewlett-Packard Company. Possession, use, or copying of this software and media is authorized only pursuant to a valid written license from Hewlett-Packard or an authorized sublicensor. This ECO has not been through an exhaustive field test process. Due to the experimental stage of this ECO/workaround, Hewlett-Packard makes no representations regarding its use or performance. The customer shall have the sole responsibility for adequate protection and back-up data used in conjunction with this ECO/workaround.