Perhaps the reason -k was broken is that nobody knew it existed?
Fixes: 938904c4 ("xfs_io: add fzero command for zeroing range via fallocate")
Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
---
diff --git a/man/man8/xfs_io.8 b/man/man8/xfs_io.8
index fbf50df..980dcfd 100644
--- a/man/man8/xfs_io.8
+++ b/man/man8/xfs_io.8
@@ -516,10 +516,13 @@ Call fallocate with FALLOC_FL_UNSHARE_RANGE flag as described in the
.BR fallocate (2)
manual page to unshare all shared blocks within the range.
.TP
-.BI fzero " offset length"
+.BI "fzero [ \-k ]" " offset length"
Call fallocate with FALLOC_FL_ZERO_RANGE flag as described in the
.BR fallocate (2)
manual page to allocate and zero blocks within the range.
+With the
+.B -k
+option, use the FALLOC_FL_KEEP_SIZE flag as well.
.TP
.BI zero " offset length"
Call xfsctl with
