diff --git a/lustre/ChangeLog b/lustre/ChangeLog
index be94848b3aca4173f6b630eece18a7f7241b5a94..58fc966855b3f8b68f49c08aaf01f726a29a9d89 100644
--- a/lustre/ChangeLog
+++ b/lustre/ChangeLog
@@ -331,6 +331,11 @@ Details    : llapi_semantic_traverse() modifies the "path" argument by
              appending values to the end of the origin string, and a 
              overrun may occur. Adding buffer overrun check in liblustreapi.
 
+Severity   : normal
+Bugzilla   : 13730
+Description: client sometimes tried revalidate root dentry.
+Details    : not revalidate dentry if it root dentry.
+
 --------------------------------------------------------------------------------
 
 2007-08-10         Cluster File Systems, Inc. <info@clusterfs.com>
diff --git a/lustre/llite/dcache.c b/lustre/llite/dcache.c
index 4c0c6a55e718b66f9bbab0499a6641ed539df5d4..4f5803b8012a9b483fb5110daedb72c74925af93 100644
--- a/lustre/llite/dcache.c
+++ b/lustre/llite/dcache.c
@@ -272,7 +272,7 @@ restart:
 
                         continue;
                 }
-                
+
                 if (ll_drop_dentry(dentry))
                           goto restart;
         }
@@ -389,7 +389,7 @@ int ll_revalidate_it(struct dentry *de, int lookup_flags,
 
         /* Root of the lustre tree. Always valid.
          * Attributes will be fixed up in ll_inode_revalidate_it */
-        if (de->d_name.name[0] == '/' && de->d_name.len == 1)
+        if (de == de->d_sb->s_root)
                 RETURN(1);
 
         OBD_FAIL_TIMEOUT(OBD_FAIL_MDC_REVALIDATE_PAUSE, 5);