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Use the pool allocator and "nointr" pool page allocator for name cache entries. 

The only benefit this provides is that we don't use kmem_map to map the memory
used for name cache entries (though, this is a 13 virtual page savings on my
PPro) since vnodes are never freed (they have their own freelist).
This commit is contained in:
thorpej 1998-09-01 04:33:56 +00:00
parent 0ff273aad2
commit 77ecf8273e
1 changed files with 8 additions and 3 deletions
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11
sys/kern/vfs_cache.c
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@ -1,4 +1,4 @@
/* $NetBSD: vfs_cache.c,v 1.17 1998/08/04 04:03:18 perry Exp $ */
/* $NetBSD: vfs_cache.c,v 1.18 1998/09/01 04:33:56 thorpej Exp $ */
/*
* Copyright (c) 1989, 1993
@ -43,6 +43,7 @@
#include <sys/namei.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/pool.h>
/*
* Name caching works as follows:
@ -71,6 +72,8 @@ long numcache; /* number of cache entries allocated */
TAILQ_HEAD(, namecache) nclruhead; /* LRU chain */
struct nchstats nchstats; /* cache effectiveness statistics */
struct pool namecache_pool;
int doingcache = 1; /* 1 => enable the cache */
/*
@ -186,8 +189,7 @@ cache_enter(dvp, vp, cnp)
* Free the cache slot at head of lru chain.
*/
if (numcache < desiredvnodes) {
ncp = (struct namecache *)
malloc((u_long)sizeof(*ncp), M_CACHE, M_WAITOK);
ncp = pool_get(&namecache_pool, PR_WAITOK);
memset((char *)ncp, 0, sizeof(*ncp));
numcache++;
} else if ((ncp = nclruhead.tqh_first) != NULL) {
@ -228,6 +230,9 @@ nchinit()
TAILQ_INIT(&nclruhead);
nchashtbl = hashinit(desiredvnodes, M_CACHE, M_WAITOK, &nchash);
pool_init(&namecache_pool, sizeof(struct namecache), 0, 0, 0,
"ncachepl", 0, pool_page_alloc_nointr, pool_page_free_nointr,
M_CACHE);
}
/*