nfsd: track the number of DRC entries in the cache
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 9d80dfa..c0c5847 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -27,6 +27,7 @@
static struct list_head lru_head;
static int cache_disabled = 1;
static struct kmem_cache *drc_slab;
+static unsigned int num_drc_entries;
/*
* Calculate the hash index from an XID.
@@ -68,6 +69,7 @@
if (rp->c_type == RC_REPLBUFF)
kfree(rp->c_replvec.iov_base);
list_del(&rp->c_lru);
+ --num_drc_entries;
kmem_cache_free(drc_slab, rp);
}
@@ -83,10 +85,12 @@
INIT_LIST_HEAD(&lru_head);
i = CACHESIZE;
+ num_drc_entries = 0;
while (i) {
rp = nfsd_reply_cache_alloc();
if (!rp)
goto out_nomem;
+ ++num_drc_entries;
list_add(&rp->c_lru, &lru_head);
i--;
}