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authorAlex Tomas <alex@clusterfs.com>2008-01-29 00:19:52 -0500
committerTheodore Ts'o <tytso@mit.edu>2008-01-29 00:19:52 -0500
commitc9de560ded61faa5b754137b7753da252391c55a (patch)
tree2c4311377c4aa72450e27f531e198fe3e1c67db0 /Documentation/filesystems/ext4.txt
parent1988b51e476bd097d910c9245b53f2e38aedaf0d (diff)
downloadop-kernel-dev-c9de560ded61faa5b754137b7753da252391c55a.zip
op-kernel-dev-c9de560ded61faa5b754137b7753da252391c55a.tar.gz
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>
Diffstat (limited to 'Documentation/filesystems/ext4.txt')
-rw-r--r--Documentation/filesystems/ext4.txt10
1 files changed, 9 insertions, 1 deletions
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 @@ 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.
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