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@xxxxxxxxxx>
---
fs/nfsd/nfscache.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 972c14a..4aad9e4 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;
+ }
}
/*
--
1.7.11.7
--
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