The Early Release Patch (ERP) announced in
this Engineering Advisory resolves four kernel fixes in HP Tru64
UNIX v 5.1B-4. Specifically, the ERP resolves the following
- netstat and other utilities can hang
Utilities such as netstat and collect could hang due to a read
error on /dev/mem. Other affected utilities include niffd, dbx,
This problem only affects AlphaServer GS80/GS160/GS320 systems.
However, customers using AlphaServer systems other than
GS80/GS160/GS320 can safely install the ERP.
- panic: mcs_lock: no queue entries available
Mapping a text segment (SEG), or a System V Shared memory (SSM)
region when GH regions or chunks is enabled, to a previously
used address space can lead to a panic with the string
panic: mcs_lock: no queue entries available
A typical trace for this panic is:
- kernel memory fault in do_table
A problem handling kernel memory faults within the do_table
system call can result in a system panic. Under certain
conditions, the panic could occur when a user issues a ps
A typical stack trace follows.
1 panic2 event_timeout
- panic: "pmap_destroy: valid ssm level2 PTE!"
Mapping a System V Shared Memory (SSM) region as read only when
SSM L3 GH is enabled (vm_l3gh_ssm = 1 with vm_bigpg_enabled = 1)
can cause a panic with the string:
panic: "pmap_destroy: valid ssm level2 PTE!"
Here is a typical stack trace for this panic.