[PATCH v2 2/8] nfsd: track the number of DRC entries in the cache

Jeff Layton
2013-02-04T13:18:16Z

Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
fs/nfsd/nfscache.c | 4 ++++
1 file changed, 4 insertions(+)

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 hlist_head * cache_hash;
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 @@ nfsd_reply_cache_free_locked(struct svc_cacherep *rp)
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 @@ int nfsd_reply_cache_init(void)

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--;
}
--
1.7.11.7