HP Tru64 UNIX and TruCluster Server Version 5.1B-5 Patch Summary and Release Notes (March 2009)

• Fixes the potential of multiple assert_wait and timeout panics due to kernel EVM
threads not properly preempting.
• Fixes a problem in the Memory Channel driver.
• Corrects a condition that occurs during a rolling upgrade in which the clu_ifaccess
script removes the tag file for /etc/ifaccess and sends out a warning message.
• Forces a reboot to resolve communications problems in a two node cluster rather
than hang.
• Corrects lock acquires after mpsleep.
• Causes a rebuild delay remainder to be minimally second.
• Allows the cluster to provide new functions to the dupatch command before a
member is rolled, and also provides a mechanism for backing out the added
functions.
• Addresses a memory leak in the Memory Channel transport layer.
• Fixes a problem in which a system may panic with a kernel memory fault when
a device that is being opened by one program is being deleted with the hwmgr
utility.
• Fixes a condition that causes a panic when a valid NFS packet with corrupted
embedded length field is received.
• Fixes a condition that causes an unnecessary panic due to request connection
deregistration with an invalid IP address.
• Provides performance improvement for CFS filesets mounted with the server_only
option. A log sync for create transactions is not needed for such filesets.
• Fixes a problem with single physical rail Memory Channel configurations and
cleans up stale data left on an off-line physical rail by the Memory Channel driver.
• Fixes a rare cluster hang caused by dead locks that occurred between the CFS client
and server during multiple write operations.
• Fixes multiple problems seen with the TruCluster RDG component, including
panics of the following types "rdg: unwiring", "vl_unwire: page is not wired", and
"KMF: from _otsmove."
• Allows users to add new members and create a cluster with different netmasks.
• Removes member0-specific installation files on an undo install, which could prevent
the reinstallation of the patch.
• Allows users to continue forward when they add a member to a one-node cluster
during a rolling upgrade or rolling patch.
• Enables CAA to start up and fail over system services before any of the user
services.
• Fixes an unaligned kernel access in the cluster I/O stack.
• Addresses a potential hang in the NFS server that occurs when file systems are
being relocated in a cluster.
• Provides the ability to lower the cluster_rebuild_delay.
4.3 Summary of TruCluster Server Software Patches 227