diff mbox

[v1,14/16] nfsd: track the number of DRC entries in the cache

Message ID 1359402082-29195-15-git-send-email-jlayton@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Jeff Layton Jan. 28, 2013, 7:41 p.m. UTC 
Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
 fs/nfsd/nfscache.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 896e1c0..bd21230 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -21,6 +21,7 @@ 
 static struct hlist_head *	cache_hash;
 static struct list_head 	lru_head;
 static struct kmem_cache	*drc_slab;
+static unsigned int		num_drc_entries;
 
 /*
  * Calculate the hash index from an XID.
@@ -65,6 +66,7 @@  nfsd_reply_cache_free_locked(struct svc_cacherep *rp)
 		kfree(rp->c_replvec.iov_base);
 	hlist_del(&rp->c_hash);
 	list_del(&rp->c_lru);
+	--num_drc_entries;
 	kmem_cache_free(drc_slab, rp);
 }
 
@@ -88,6 +90,7 @@  int nfsd_reply_cache_init(void)
 		goto out_nomem;
 
 	INIT_LIST_HEAD(&lru_head);
+	num_drc_entries = 0;
 	return 0;
 out_nomem:
 	printk(KERN_ERR "nfsd: failed to allocate reply cache\n");
@@ -257,6 +260,7 @@  nfsd_cache_lookup(struct svc_rqst *rqstp)
 		return RC_DOIT;
 	}
 	spin_lock(&cache_lock);
+	++num_drc_entries;
 
 	/*
 	 * Must search again just in case someone inserted one