From 8c9f6a64be9840a955e481e932f13d005c0de0de Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Thu, 15 Mar 2012 10:32:27 +0000
Subject: sparsify: Use zero-device instead of dd if=/dev/zero to zero device.

zero-device is more efficient in general, and avoids writing to blocks
which are already zero.
---
 sparsify/sparsify.ml | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/sparsify/sparsify.ml b/sparsify/sparsify.ml
index fe12490d..501540c6 100644
--- a/sparsify/sparsify.ml
+++ b/sparsify/sparsify.ml
@@ -231,11 +231,9 @@ let () =
           if not quiet then
             printf "Fill free space in volgroup %s with zero ...\n%!" vg;
 
-          (* This command is expected to fail. *)
-          (try g#dd "/dev/zero" lvdev with _ -> ());
-
-           g#sync ();
-           g#lvremove lvdev
+          g#zero_device lvdev;
+          g#sync ();
+          g#lvremove lvdev
         )
       )
   ) vgs
-- 
cgit