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

shall set the POLLWRBAND flag in the corresponding revents member when
found.
When no writes have taken place on any of the priority bands, a call to poll( ) blocks will time
out and return failure.
The poll( ) system call has been modified so if you need standards-compliant behavior, you
can use the new std_unix98 attribute.
If std_unix98 is set to a value of either 1 or 2, then the UNIX98_POLLWRBAND bit (defined as
a macro in the /usr/sys/include/sys/param.h file) gets set, which results in the internal
processing becoming indifferent to whichever external mapping of POLLWRBAND is in play. By
default, this bit in std_unix98 is not set, so poll( ) will behave the same way as it does today.
See the revised poll(2) reference page delivered in this kit.
New I/O Subsystem Attributes Can Improve Booting Speed
Three new I/O subsystem attributes control path registration during the boot process, allowing
systems with multiple paths to a large number of devices to boot faster. The following list provides
a brief description of these attributes. For additional information and settings, see the revised
sys_attrs_io(5) reference page delivered in this kit.
• boot_wait_hwc_reg
When disabled, causes a boot to the login prompt without waiting for hwc path registrations.
• hwc_reg_cmplt_notify_type
Controls how you get notified when device registration is done.
• hwc_registration_complete
Proves a query to determine if hwc path registration is complete.
By default, booting will wait for all hwc registrations to be completed. However, you can force
the boot process to complete to the login prompt earlier by changing boot_wait_hwc_regs
to 0. In either case hwc_registration_complete can be queried. This will be set to 1 as soon
as registration is complete. In addition, you can also choose to receive a console message, an
EVM event, or both when all paths have registered.
To get the biggest speed improvement when booting, you can elect to finish booting without
waiting for path registration, which is not needed to access the storage subsystem (for example,
an Oracle® database). However, if you do this, you temporarily have an incomplete hierarchy
view from the commonly run hwmgr command.
Each of the following actions can help you determine when to run the hwmgr command in order
to see the complete hierarchy:
• Enable the EVM notification option, log in, and start evmwatch to look for the EVM event,
although the EVM event could have already occurred by the time you log in.
• Enable the console log message notification option and look in the messages file for the
message.
• Query sysconfig to ensure the I/O hwc_registration_complete attribute is set before
proceeding. This action can be used regardless of how you set the notification option.
New Attributes Added to NFS and RPC Subsystems
Several new tunable attributes have been added to the NFS server subsystem, nfs_server, the
NFS client subsystem, nfs, and the Remote Procedure Call (RPC) subsystem, rpc Previously,
the configurations produced by these attributes could only be changed by using the dbx command.
Now, you can easily use and modify these kernel subsystem configurations with the sysconfig
command.
40 Tru64 UNIX Patches