1 files changed, 9 insertions, 2 deletions

diff --git a/fs/cifs/README b/fs/cifs/README
index e7a3ce62d71b..bb90941826ad 100644
--- a/fs/cifs/README
+++ b/fs/cifs/README
@@ -482,9 +482,16 @@ These experimental features and tracing can be enabled by changing flags in
 kernel, e.g.  insmod cifs).  To enable a feature set it to 1 e.g.  to enable 
 tracing to the kernel message log type: 
 
-        echo 1 > /proc/fs/cifs/cifsFYI
+        echo 7 > /proc/fs/cifs/cifsFYI
         
-and for more extensive tracing including the start of smb requests and responses
+cifsFYI functions as a bit mask. Setting it to 1 enables additional kernel
+logging of various informational messages.  2 enables logging of non-zero
+SMB return codes while 4 enables logging of requests that take longer
+than one second to complete (except for byte range lock requests). 
+Setting it to 4 requires defining CONFIG_CIFS_STATS2 manually in the
+source code (typically by setting it in the beginning of cifsglob.h),
+and setting it to seven enables all three.  Finally, tracing
+the start of smb requests and responses can be enabled via:
 
         echo 1 > /proc/fs/cifs/traceSMB