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<TITLE>
TITLE: HP Tru64 UNIX - Potential Panics in CFS During Low Memory Conditions
Copyright (c) Hewlett-Packard Company 2006. All rights reserved.
PRODUCT: HP TruCluster Server [R] V5.1A
SOURCE: Hewlett-Packard Company
ECO INFORMATION:
ECO Name: TCRKIT1000409-V51AB24-E-20060217
ECO Kit Approximate Size: 3.96MB
Kit Applies To: HP TruCluster Server V5.1A PK6 (BL24)
ECO Kit CHECKSUMS:
/usr/bin/sum results:
38364 4060
/usr/bin/cksum results:
1141365210 4157440
MD5 results:
cde91b7ad958cd0f53f78f82f1f0f6a3
SHA1 results:
d2e48ea842612d802f1ecba06d1769dc6f8ccdd0
ECO KIT SUMMARY:
A dupatch-based, Early Release Patch kit exists for HP TruCluster Server V5.1A
that contains solutions to the following problem(s):
This patch prevents a variety of panics that may occur during low memory
conditions when an error occurs during a cfs write. The panics seen to date
are:
Kernel Memory Fault in simple_lock via cfs_rwvp_cache
Unaligned Access in msfs_putpage
Assert Failed: brp->br_allocated>=0
PANIC: pg_hold - underflow
Kernel Memory Fault in cfs_delay_adjust
The stack traces of the panicing threads are:
KMF - simple_lock via cfs_rwvp_cache
4 panic
5 trap
6 _XentMM
7 simple_lock
8 cfs_rwvp_cache
9 cfs_cachewrite
10 cfs_write
11 vn_write
12 rwuio
13 write
14 syscall
15 _Xsyscall
UNA
4 panic
5 afault_trap
6 _XentUna
7 msfs_putpage
8 ubc_msync
9 cfs_ubc_msync
10 ubc_msync
11 u_map_control
12 msync
13 syscall
14 _Xsyscall
ASSERT FAILED
4 panic
5 cfsdb_assert
6 cfscall_writepages
7 cfs_do_bio
8 cfs_strategy
9 cfs_rwblk
10 cfs_rwvp_cache
11 cfs_cachewrite
12 cfs_write
13 vn_write
14 rwuio
15 write
16 syscall
17 _Xsyscall
PG_HOLD UNDERFLOW
1 panic
2 ubc_page_release
3 cfs_rwvp_cache
4 cfs_cachewrite
5 cfs_write
6 vn_pwrite
7 prwuio
8 pwrite
9 syscall
10 _Xsyscall
KMF - in cfs_delay_adjust
1 panic
2 trap
3 _XentMM
4 cfs_delay_adjust
5 cfs_rwvp_cache
6 cfs_cachewrite
7 cfs_write
8 vn_write
9 rwuio
10 write
11 syscall
12 _Xsyscall
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.
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 TruCluster Server V5.1A PK6 (BL24) prior to
installing this Early Release Patch Kit.
SUPERSEDE INFORMATION:
None
KNOWN PROBLEMS WITH THE PATCH KIT:
None.
RELEASE NOTES FOR TCRKIT1000409-V51AB24-E-20060217:
Release Notes
This document summarizes the contents and special instructions for the
TruCluster Server V5.1A 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 QXCM1000189313
* for TruCluster Server V5.1A T64V51AB24AS0006-20031031.tar (BL24)
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
> <copy the kit to /tmp/CSPkit1>
> tar -xpvf DUV40D13-C0044900-1285-20000328.tar
> cd patch_kit
> ./dupatch
2 Special Instructions
SPECIAL INSTRUCTIONS for TruCluster Server V5.1A Patch C342.02
3 Summary of CSPatches contained in this kit
TruCluster Server V5.1A
PatchId Summary Of Fix
----------------------------------------
C342.02 cfs.mod for KMF during low memory
4 Additional information from Engineering
None
5 Affected system files
This patch delivers the following files:
TruCluster Server V5.1A
Patch C342.02
./usr/opt/TruCluster/sys/cfs.mod
CHECKSUM: 00599 1385
SUBSET: TCRBASE520
[R] UNIX is a registered trademark in the United States and other countries
licensed exclusively through X/Open Company Limited.
Copyright Hewlett-Packard Company 2006. 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.
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