HP-UX 11i Version 2 May 2005 Release Notes

General System Administration
Kernel Tunable hdlpreg_hash_locks (Deprecated)
Chapter 5
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Kernel Tunable hdlpreg_hash_locks (Deprecated)
The kernel tunable hdlpreg_hash_locks is used to size a set of spinlocks used by the
kernel for virtual object operations. To avoid memory consumption but reduce
contention, a hashing algorithm is used to determine which lock from the pool will be
used. This tunable sets the fixed size of the pool for the system, allowing more locks to be
created for systems which experience performance degradation due to contention on the
hashed locks.
Summary of Change
The kernel tunable hdlpreg_hash_locks has been deprecated. This tunable will be
obsoleted (removed) post HP-UX 11i v2.
Changes to releases after HP-UX 11i v2 will remove the need for the spinlocks and the
hashed pool, removing the need for this tunable.
Impact
There is no change for the customer in this release. This is a warning of an upcoming
removal of the kernel tunable hdlpreg_hash_locks.
Compatibility
There is no compatibility change for this release.
Performance
There is no performance impact for this change.
Documentation
For further details and values, refer to the hdlpreg_hash_locks (5) manpage.
Obsolescence
The kernel tunable hdlpreg_hash_locks has been deprecated. This tunable will be
obsoleted (removed) post HP-UX 11i v2.
Node and Host Name Expansion
The optional Node and Host Name Expansion (NodeHostNameXpnd) product bundle,
revision B.11.23.01, provides you with the ability to set node and host names up to 255
bytes.