diff options
| author | dyson <dyson@FreeBSD.org> | 1996-01-19 04:00:31 +0000 |
|---|---|---|
| committer | dyson <dyson@FreeBSD.org> | 1996-01-19 04:00:31 +0000 |
| commit | 8fc8a772af22f6e03233d248fa2dbd9b5c2bdd7d (patch) | |
| tree | 3c31fd95ea745005a9cd6733db5a16f31bd828a6 /sys/kern/vfs_cache.c | |
| parent | 6755beedbf0ddaa9e66e91c8e74f620ede6bfad5 (diff) | |
| download | FreeBSD-src-8fc8a772af22f6e03233d248fa2dbd9b5c2bdd7d.zip FreeBSD-src-8fc8a772af22f6e03233d248fa2dbd9b5c2bdd7d.tar.gz | |
Eliminated many redundant vm_map_lookup operations for vm_mmap.
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.
Diffstat (limited to 'sys/kern/vfs_cache.c')
| -rw-r--r-- | sys/kern/vfs_cache.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sys/kern/vfs_cache.c b/sys/kern/vfs_cache.c index 6c231f4..924fa18 100644 --- a/sys/kern/vfs_cache.c +++ b/sys/kern/vfs_cache.c @@ -33,7 +33,7 @@ * SUCH DAMAGE. * * @(#)vfs_cache.c 8.3 (Berkeley) 8/22/94 - * $Id: vfs_cache.c,v 1.18 1995/12/14 09:52:47 phk Exp $ + * $Id: vfs_cache.c,v 1.19 1995/12/22 15:56:35 phk Exp $ */ #include <sys/param.h> @@ -47,6 +47,8 @@ #include <sys/errno.h> #include <sys/malloc.h> +#define MAXVNODEUSE 32 + /* * Name caching works as follows: * @@ -173,6 +175,8 @@ cache_lookup(dvp, vpp, cnp) nchstats.ncs_goodhits++; TOUCH(ncp); *vpp = ncp->nc_vp; + if ((*vpp)->v_usage < MAXVNODEUSE) + (*vpp)->v_usage++; return (-1); } @@ -234,6 +238,8 @@ cache_enter(dvp, vp, cnp) /* fill in cache info */ ncp->nc_vp = vp; + if (vp->v_usage < MAXVNODEUSE) + ++vp->v_usage; ncp->nc_vpid = vp->v_id; ncp->nc_dvp = dvp; ncp->nc_dvpid = dvp->v_id; |
