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-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 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.
86When mounting an ext4 filesystem, the following option are accepted: 86When mounting an ext4 filesystem, the following option are accepted:
87(*) == default 87(*) == default
88 88
89extents ext4 will use extents to address file data. The 89extents (*) ext4 will use extents to address file data. The
90 file system will no longer be mountable by ext3. 90 file system will no longer be mountable by ext3.
91 91
92noextents ext4 will not use extents for newly created files
93
92journal_checksum Enable checksumming of the journal transactions. 94journal_checksum Enable checksumming of the journal transactions.
93 This will allow the recovery code in e2fsck and the 95 This will allow the recovery code in e2fsck and the
94 kernel to detect corruption in the kernel. It is a 96 kernel to detect corruption in the kernel. It is a
@@ -206,6 +208,12 @@ nobh (a) cache disk block mapping information
206 "nobh" option tries to avoid associating buffer 208 "nobh" option tries to avoid associating buffer
207 heads (supported only for "writeback" mode). 209 heads (supported only for "writeback" mode).
208 210
211mballoc (*) Use the multiple block allocator for block allocation
212nomballoc disabled multiple block allocator for block allocation.
213stripe=n Number of filesystem blocks that mballoc will try
214 to use for allocation size and alignment. For RAID5/6
215 systems this should be the number of data
216 disks * RAID chunk size in file system blocks.
209 217
210Data Mode 218Data Mode
211--------- 219---------