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-rw-r--r--Documentation/filesystems/ext4.txt10
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.