1 files changed, 13 insertions, 5 deletions

diff --git a/Documentation/filesystems/ceph.txt b/Documentation/filesystems/ceph.txt
index 763d8ebbbebd..d6030aa33376 100644
--- a/Documentation/filesystems/ceph.txt
+++ b/Documentation/filesystems/ceph.txt
@@ -119,12 +119,20 @@ Mount Options
         must rely on TCP's error correction to detect data corruption
         in the data payload.
 
-  noasyncreaddir
-        Disable client's use its local cache to satisfy readdir
-        requests.  (This does not change correctness; the client uses
-        cached metadata only when a lease or capability ensures it is
-        valid.)
+  dcache
+        Use the dcache contents to perform negative lookups and
+        readdir when the client has the entire directory contents in
+        its cache.  (This does not change correctness; the client uses
+        cached metadata only when a lease or capability ensures it is
+        valid.)
+
+  nodcache
+        Do not use the dcache as above.  This avoids a significant amount of
+        complex code, sacrificing performance without affecting correctness,
+        and is useful for tracking down bugs.
 
+  noasyncreaddir
+        Do not use the dcache as above for readdir.
 
 More Information
 ================