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>
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 4f329af..560f88d 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -86,9 +86,11 @@
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" 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
---------