ext4: Add multi block allocator for ext4

Signed-off-by: Alex Tomas <alex@clusterfs.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 9 insertions, 1 deletions

diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 4f329afe20ec..560f88dc7090 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -86,9 +86,11 @@ 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
@@ -206,6 +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
 ---------