1 files changed, 16 insertions, 25 deletions

diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 232a575a0c48..4917cf24a5e0 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -160,7 +160,9 @@ noload			if the filesystem was not unmounted cleanly,
                         lead to any number of problems.
 
 data=journal            All data are committed into the journal prior to being
-                        written into the main file system.
+                        written into the main file system.  Enabling
+                        this mode will disable delayed allocation and
+                        O_DIRECT support.
 
 data=ordered    (*)     All data are forced directly out to the main file
                         system prior to its metadata being committed to the
@@ -201,30 +203,19 @@ inode_readahead_blks=n	This tuning parameter controls the maximum
                         table readahead algorithm will pre-read into
                         the buffer cache.  The default value is 32 blocks.
 
-orlov           (*)     This enables the new Orlov block allocator. It is
-                        enabled by default.
-
-oldalloc                This disables the Orlov block allocator and enables
-                        the old block allocator.  Orlov should have better
-                        performance - we'd like to get some feedback if it's
-                        the contrary for you.
-
-user_xattr              Enables Extended User Attributes.  Additionally, you
-                        need to have extended attribute support enabled in the
-                        kernel configuration (CONFIG_EXT4_FS_XATTR).  See the
-                        attr(5) manual page and http://acl.bestbits.at/ to
-                        learn more about extended attributes.
-
-nouser_xattr            Disables Extended User Attributes.
-
-acl                     Enables POSIX Access Control Lists support.
-                        Additionally, you need to have ACL support enabled in
-                        the kernel configuration (CONFIG_EXT4_FS_POSIX_ACL).
-                        See the acl(5) manual page and http://acl.bestbits.at/
-                        for more information.
+nouser_xattr            Disables Extended User Attributes. If you have extended
+                        attribute support enabled in the kernel configuration
+                        (CONFIG_EXT4_FS_XATTR), extended attribute support
+                        is enabled by default on mount. See the attr(5) manual
+                        page and http://acl.bestbits.at/ for more information
+                        about extended attributes.
 
 noacl                   This option disables POSIX Access Control List
-                        support.
+                        support. If ACL support is enabled in the kernel
+                        configuration (CONFIG_EXT4_FS_POSIX_ACL), ACL is
+                        enabled by default on mount. See the acl(5) manual
+                        page and http://acl.bestbits.at/ for more information
+                        about acl.
 
 bsddf           (*)     Make 'df' act like BSD.
 minixdf                 Make 'df' act like Minix.
@@ -419,8 +410,8 @@ written to the journal first, and then to its final location.
 In the event of a crash, the journal can be replayed, bringing both data and
 metadata into a consistent state.  This mode is the slowest except when data
 needs to be read from and written to disk at the same time where it
-outperforms all others modes.  Currently ext4 does not have delayed
-allocation support if this data journalling mode is selected.
+outperforms all others modes.  Enabling this mode will disable delayed
+allocation and O_DIRECT support.
 
 /proc entries
 =============