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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>
This commit is contained in:
Jeff Layton 2013-02-04 08:18:01 -05:00 committed by J. Bruce Fields
parent 56c2548b2d
commit 0ee0bf7ee5
1 changed files with 4 additions and 0 deletions
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4
fs/nfsd/nfscache.c
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@ -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--;
}