Add support for a new inode flag, which is to be used
for indicating the top of directory hierarchies for the
Orlov block allocator.
diff --git a/misc/chattr.1.in b/misc/chattr.1.in
index 218a291..1e17bd8 100644
--- a/misc/chattr.1.in
+++ b/misc/chattr.1.in
@@ -19,7 +19,7 @@
.B chattr
changes the file attributes on a Linux second extended file system.
.PP
-The format of a symbolic mode is +-=[ASacDdistu].
+The format of a symbolic mode is +-=[ASacDdisTtu].
.PP
The operator `+' causes the selected attributes to be added to the
existing attributes of the files; `-' causes them to be removed; and
@@ -28,7 +28,8 @@
The letters `ASacDdijsu' select the new attributes for the files:
don't update atime (A), synchronous updates (S), synchronous directory
updates (D), append only (a), compressed (c), no dump (d), immutable (i),
-data journalling (j), secure deletion (s), and undeletable (u).
+data journalling (j), secure deletion (s), top of directory hierarchy
+(T), no tail-merging (t), and undeletable (u).
.SH OPTIONS
.TP
.B \-R
@@ -85,6 +86,10 @@
the changes are written synchronously on the disk; this is equivalent to
the `sync' mount option applied to a subset of the files.
.PP
+A directory with the 'T' attribute will be deemed to be the top of
+directory hierarchies for the purposes of the Orlov block allocator
+(which is used in newer kernels).
+.PP
A file with the 't' attribute will not have a partial block fragment at
the of the file merged with other files (for those filesystems which
support tail-merging). This is necessary for applications such as LILO