1 files changed, 18 insertions, 7 deletions

diff --git a/fs/cifs/README b/fs/cifs/README
index 4d01697722cc..eb3efd5a6a81 100644
--- a/fs/cifs/README
+++ b/fs/cifs/README
@@ -301,10 +301,21 @@ A partial list of the supported mount options follows:
                 during the local client kernel build will be used.
                 If server does not support Unicode, this parameter is
                 unused.
-  rsize         default read size (usually 16K)
-  wsize         default write size (usually 16K, 32K is often better over GigE)
-                maximum wsize currently allowed by CIFS is 57344 (14 4096 byte
-                pages)
+  rsize         default read size (usually 16K). The client currently
+                can not use rsize larger than CIFSMaxBufSize. CIFSMaxBufSize
+                defaults to 16K and may be changed (from 8K to the maximum
+                kmalloc size allowed by your kernel) at module install time
+                for cifs.ko. Setting CIFSMaxBufSize to a very large value
+                will cause cifs to use more memory and may reduce performance
+                in some cases.  To use rsize greater than 127K (the original
+                cifs protocol maximum) also requires that the server support
+                a new Unix Capability flag (for very large read) which some
+                newer servers (e.g. Samba 3.0.26 or later) do. rsize can be
+                set from a minimum of 2048 to a maximum of 130048 (127K or
+                CIFSMaxBufSize, whichever is smaller)
+  wsize         default write size (default 57344)
+                maximum wsize currently allowed by CIFS is 57344 (fourteen
+                4096 byte pages)
   rw            mount the network share read-write (note that the
                 server may still consider the share read-only)
   ro            mount network share read-only
@@ -582,10 +593,10 @@ the start of smb requests and responses can be enabled via:
 
         echo 1 > /proc/fs/cifs/traceSMB
 
-Two other experimental features are under development and to test 
-require enabling CONFIG_CIFS_EXPERIMENTAL
+Two other experimental features are under development. To test these
+requires enabling CONFIG_CIFS_EXPERIMENTAL
 
-        More efficient write operations
+        ipv6 enablement
 
         DNOTIFY fcntl: needed for support of directory change 
                             notification and perhaps later for file leases)