HP Tru64 UNIX and TruCluster Server Version 5.1B-6 Patch Summary and Release Notes

• Fixes an awk() argument buffer limitation that can cause patch installations to fail if a large
number of subsets (in excess of 500) are loaded on the system.
• Fixes sh to handle a large number of open files.
Patch 27010.00
OSFBIN540
• Provides support for identifying references to half-open pipes via the fuser utility.
• Improves performance for some multithreaded applications running on AlphaServer GS320
and GS1280 class systems.
• Corrects a scenario in which a spurious wakeup is sent to a process that had interrupted a
blocked attempt to set a mandatory file lock.
• Provides performance enhancements to the vm_overflow feature.
• Changes the way page migrations occur on a NUMA system to address poor performance
due to excessive paging.
• Corrects an incompatibility between the cpus_in_rad and gh_chunks/rad_gh_regions tunable
attributes that could result in a boot failure.
• Corrects a problem with pagetable page allocations that could leave a thread waiting
indefinitely during a fork operation.
• Corrects "ubc_wire: hash failed" panics on non-NUMA systems.
• Corrects a "not wired" panic that occurs with System V shared memory and bigpages.
• Reduces scheduling contention when unmapping shared address space that has an extremely
high number of mappers.
• Handles reservation conflict errors to address cluster node hang during boot.
• Updates the audit system to display additional information for numa_syscalls and
msfs_syscall system calls.
• Provides a tunable attribute to allow the reserving of a percentage of vnodes for root use.
• Fixes an issue in the VM subsystem in which a page that is not managed by VM is incorrectly
identified as being managed by VM.
• Fixes a problem in UFS superblock update logic that could result in a failure to report errors
encountered when writing cylinder group summary blocks.
• Provides a new cluster-specific link aggregation distribution algorithm when using LAG in
a LAN cluster.
• Reduces fork/exec overhead on systems with large default stack sizes.
• Fixes a cluster deadlock/hang issue when a new device is discovered.
• Fixes a kernel memory fault panic that occurs during a NetRAIN interface failure.
• Fixes a CPU hang caused by /dev/random.
• Corrects a condition that causes a process hang and system panic when using System V
shared memory and asynchronous I/O.
• Corrects a minor tuning issue with netisrthreads on NUMA machines. Previously, four
netisr threads were started per RAD, whereas the default number of netisr threads per RAD
now equals the number of CPUs per RAD.
• Fixes problems with RPC for configurations with no RAD 0.
• Fixes a problem in which unkillable processes occur when debugging multi-threaded
programs with the totalview debugger on a Sierra Cluster.
• Fixes an underlying problem in NFS that can trigger an assert failure in CFS. These conditions
can be triggered by a failed NFS mount.
• Resolves a synchronization issue between pageout and exit paths.
• Introduces sysconfig tunable attibutes for NFS/RPC
• Fixes multiple panics and application hangs seen when interacting with Process Shared
POSIX 1003.1c objects.
90 Tru64 UNIX Patches