1 files changed, 19 insertions, 1 deletions

diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 6a4adcae9f9a..560f88dc7090 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -86,9 +86,21 @@ Alex is working on a new set of patches right now.
 When mounting an ext4 filesystem, the following option are accepted:
 (*) == default
 
-extents                 ext4 will use extents to address file data.  The
+extents         (*)     ext4 will use extents to address file data.  The
                         file system will no longer be mountable by ext3.
 
+noextents               ext4 will not use extents for newly created files
+
+journal_checksum        Enable checksumming of the journal transactions.
+                        This will allow the recovery code in e2fsck and the
+                        kernel to detect corruption in the kernel.  It is a
+                        compatible change and will be ignored by older kernels.
+
+journal_async_commit    Commit block can be written to disk without waiting
+                        for descriptor blocks. If enabled older kernels cannot
+                        mount the device. This will enable 'journal_checksum'
+                        internally.
+
 journal=update          Update the ext4 file system's journal to the current
                         format.
 
@@ -196,6 +208,12 @@ nobh			(a) cache disk block mapping information
                         "nobh" option tries to avoid associating buffer
                         heads (supported only for "writeback" mode).
 
+mballoc         (*)     Use the multiple block allocator for block allocation
+nomballoc               disabled multiple block allocator for block allocation.
+stripe=n                Number of filesystem blocks that mballoc will try
+                        to use for allocation size and alignment. For RAID5/6
+                        systems this should be the number of data
+                        disks *  RAID chunk size in file system blocks.
 
 Data Mode
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