Add the description of the size per one extent and the maximum extent size
in ext4 into e4defrag man page.
Signed-off-by: Kazuya Mio <[email protected]>
---
e4defrag.8.in | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/misc/e4defrag.8.in b/misc/e4defrag.8.in
index 3ba8570..75e1bc9 100644
--- a/misc/e4defrag.8.in
+++ b/misc/e4defrag.8.in
@@ -35,16 +35,20 @@ point.
.SH OPTIONS
.TP
.B \-c
-Get the fragmentation count and calculate fragmentation score based on it
-before and after defrag. By seeing this score, we can determine whether we
-should execute
+Get a current fragmentation count and an ideal fragmentation count, and
+calculate fragmentation score based on them. By seeing this score, we can
+determine whether we should execute
.B e4defrag
to
.IR target .
When used with
.B \-v
-option, the fragmentation count before and after defrag is printed for each
-file.
+option, the current fragmentation count and the ideal fragmentation count are
+printed for each file.
+.IP
+Also this option outputs the average data size in one extent. If you see it,
+you'll find the file has ideal extents or not. Note that the maximum extent
+size is 131072KB in ext4 filesystem (if block size is 4KB).
.IP
If this option is specified,
.I target