nfsd: note inadequate stats locking
After 89a26b3d295d "nfsd: split DRC global spinlock into per-bucket
locks", there is no longer a single global spinlock to protect these
stats.
So, really we need to fix that. For now, at least fix the comment.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 46240c4..ceb413f 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -142,8 +142,11 @@ struct nfsd_net {
unsigned int drc_hashsize;
/*
- * Stats and other tracking of on the duplicate reply cache. All of these and
- * the "rc" fields in nfsdstats are protected by the cache_lock
+ * Stats and other tracking of on the duplicate reply cache.
+ * These fields and the "rc" fields in nfsdstats are modified
+ * with only the per-bucket cache lock, which isn't really safe
+ * and should be fixed if we want the statistics to be
+ * completely accurate.
*/
/* total number of entries */