diff options
| author | Jeff Layton <jlayton@redhat.com> | 2013-01-28 14:41:10 -0500 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-02-04 09:16:21 -0500 |
| commit | 8a8bc40d9ba0890f88dbf7a7c8fa81ddc77c08e3 (patch) | |
| tree | 30c6c2dcfeaa727bad2aa73738da8c5c871d0703 | |
| parent | 09662d58d5a2d75c8c29558dda4fc5134ef14b25 (diff) | |
nfsd: create a dedicated slabcache for DRC entries
Currently we use kmalloc() which wastes a little bit of memory on each
allocation since it's a power of 2 allocator. Since we're allocating a
1024 of these now, and may need even more later, let's create a new
slabcache for them.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/nfscache.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 972c14a033ee..4aad9e4a6161 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -26,6 +26,7 @@ static struct hlist_head * cache_hash; static struct list_head lru_head; static int cache_disabled = 1; +static struct kmem_cache *drc_slab; /* * Calculate the hash index from an XID. @@ -51,10 +52,15 @@ int nfsd_reply_cache_init(void) struct svc_cacherep *rp; int i; + drc_slab = kmem_cache_create("nfsd_drc", sizeof(struct svc_cacherep), + 0, 0, NULL); + if (!drc_slab) + goto out_nomem; + INIT_LIST_HEAD(&lru_head); i = CACHESIZE; while (i) { - rp = kmalloc(sizeof(*rp), GFP_KERNEL); + rp = kmem_cache_alloc(drc_slab, GFP_KERNEL); if (!rp) goto out_nomem; list_add(&rp->c_lru, &lru_head); @@ -85,13 +91,18 @@ void nfsd_reply_cache_shutdown(void) if (rp->c_state == RC_DONE && rp->c_type == RC_REPLBUFF) kfree(rp->c_replvec.iov_base); list_del(&rp->c_lru); - kfree(rp); + kmem_cache_free(drc_slab, rp); } cache_disabled = 1; kfree (cache_hash); cache_hash = NULL; + + if (drc_slab) { + kmem_cache_destroy(drc_slab); + drc_slab = NULL; + } } /* |