src/sys/kern/vfs_cache.c, branch release/2.2.8_cvs

This commit was manufactured by cvs2svn to create tag

1999-01-21T00:55:30Z

'RELENG_2_2_8_RELEASE'. This commit was manufactured to restore the state of the 2.2.8-RELEASE image. Releases prior to 5.3-RELEASE are omitting the secure/ and crypto/ subdirs.

Eliminated many redundant vm_map_lookup operations for vm_mmap.

1996-01-19T04:00:31Z

Speed up for vfs_bio -- addition of a routine bqrelse to greatly diminish overhead for merged cache. Efficiency improvement for vfs_cluster. It used to do alot of redundant calls to cluster_rbuild. Correct the ordering for vrele of .text and release of credentials. Use the selective tlb update for 486/586/P6. Numerous fixes to the size of objects allocated for files. Additionally, fixes in the various pagers. Fixes for proper positioning of vnode_pager_setsize in msdosfs and ext2fs. Fixes in the swap pager for exhausted resources. The pageout code will not as readily thrash. Change the page queue flags (PG_ACTIVE, PG_INACTIVE, PG_FREE, PG_CACHE) into page queue indices (PQ_ACTIVE, PQ_INACTIVE, PQ_FREE, PQ_CACHE), thereby improving efficiency of several routines. Eliminate even more unnecessary vm_page_protect operations. Significantly speed up process forks. Make vm_object_page_clean more efficient, thereby eliminating the pause that happens every 30seconds. Make sequential clustered writes B_ASYNC instead of B_DELWRI even in the case of filesystems mounted async. Fix a panic with busy pages when write clustering is done for non-VMIO buffers.

kern_conf.c: remove a now unused variable.

1995-12-22T15:56:35Z

vfs_cache.c: Fix a very rare probelm in the vnode-cache. Submitted by: Terry Lambert

Another mega commit to staticize things.

1995-12-14T09:55:16Z

Second batch of cleanup changes.

1995-10-29T15:33:36Z

This time mostly making a lot of things static and some unused variables here and there.

Eliminate sloppy common-style declarations. There should be none left for

1995-07-29T11:44:31Z

the LINT configuation.

Remove trailing whitespace.

1995-05-30T08:16:23Z

Fixed serious off by one bug I introduced that will likely cause the

1995-04-15T00:49:35Z

machine to panic whenever the name cache fills up. Submitted by: John Dyson

kern_subr.c:

1995-04-04T02:01:13Z

Added a new type to uiomove - "UIO_NOCOPY" which causes it to update pointers and counts, but doesn't do any data copying. This is needed for upcoming changes to the way that the vnode pager does its page outs. Added a new hash init function call "phashinit" that allocates and initializes a prime number sized hash table. vfs_cache.c: Changed hashing algorithm to use the remainder of dividing by a prime number to improve the distribution characteristcs. Uses new phashinit function in kern_subr.c.

Patch from Kirk McKusick to fix a bug introduced in the Poul's vfs_cache

1995-03-19T09:33:51Z

rewrite.