1 files changed, 10 insertions, 0 deletions

diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 6a4adcae9f9a..4f329afe20ec 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -89,6 +89,16 @@ When mounting an ext4 filesystem, the following option are accepted:
 extents                 ext4 will use extents to address file data.  The
                         file system will no longer be mountable by ext3.
 
+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.