Documentation: fix description of ext4's block_validity mount option
Fix ext4 documentation according to commit 45f1a9c3f63d
("ext4: enable block_validity by default")
Also fix some typos.
[ Further documentation cleanups by tytso ]
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 6c0108e..3698ed3 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -351,14 +351,13 @@
interoperability with older kernels which only
store and expect 16-bit values.
-block_validity This options allows to enables/disables the in-kernel
+block_validity(*) These options enable or disable the in-kernel
noblock_validity facility for tracking filesystem metadata blocks
- within internal data structures. This allows multi-
- block allocator and other routines to quickly locate
- extents which might overlap with filesystem metadata
- blocks. This option is intended for debugging
- purposes and since it negatively affects the
- performance, it is off by default.
+ within internal data structures. This allows multi-
+ block allocator and other routines to notice
+ bugs or corrupted allocation bitmaps which cause
+ blocks to be allocated which overlap with
+ filesystem metadata blocks.
dioread_lock Controls whether or not ext4 should use the DIO read
dioread_nolock locking. If the dioread_nolock option is specified