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-rw-r--r--Documentation/btrfs-filesystem.asciidoc4
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/btrfs-filesystem.asciidoc b/Documentation/btrfs-filesystem.asciidoc
index eeede37d..86652ffd 100644
--- a/Documentation/btrfs-filesystem.asciidoc
+++ b/Documentation/btrfs-filesystem.asciidoc
@@ -79,11 +79,11 @@ show sizes in TiB, or TB with --si
If conflicting options are passed, the last one takes precedence.
*defragment* [options] <file>|<dir> [<file>|<dir>...]::
-Defragment file data on a mounted filesytem.
+Defragment file data on a mounted filesystem.
+
If '-r' is passed, files in dir will be defragmented recursively.
The start position and the number of bytes to defragment can be specified by
-start and len using '-s' and '-l' options below.
+start and length using '-s' and '-l' options below.
Extents bigger than value given by '-t' will be skipped, otherwise this value
is used as a target extent size, but is only advisory and may not be reached
if the free space is too fragmented.