1 files changed, 6 insertions, 0 deletions

diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 0d5394920a31..289057958f90 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -177,6 +177,11 @@ barrier=<0|1(*)>	This enables/disables the use of write barriers in
                         your disks are battery-backed in one way or another,
                         disabling barriers may safely improve performance.
 
+inode_readahead=n       This tuning parameter controls the maximum
+                        number of inode table blocks that ext4's inode
+                        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.
 
@@ -252,6 +257,7 @@ stripe=n		Number of filesystem blocks that mballoc will try
 delalloc        (*)     Deferring block allocation until write-out time.
 nodelalloc              Disable delayed allocation. Blocks are allocation
                         when data is copied from user to page cache.
+
 Data Mode
 =========
 There are 3 different data modes: