[Libguestfs] [PATCH v2 2/4] sparsify: support QEMU detect-zeroes in copying mode (RHBZ#1130506)

Fixes RHBZ#1130506 See also: https://lists.gnu.org/archive/html/qemu-devel/2012-07/msg03747.html --- sparsify/copying.ml | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sparsify/copying.ml b/sparsify/copying.ml index 9f788b9..111dfeb 100644 --- a/sparsify/copying.ml +++ b/sparsify/copying.ml @@ -190,7 +190,8 @@ You can ignore this warning or change it to a hard failure using the if verbose then g#set_verbose true; (* Note that the temporary overlay disk is always qcow2 format. *) - g#add_drive ~format:"qcow2" ~readonly:false ~cachemode:"unsafe" overlaydisk; + g#add_drive ~format:"qcow2" ~readonly:false ~cachemode:"unsafe" overlaydisk + ~detectzeros: true; if not quiet then Progress.set_up_progress_bar ~machine_readable g; g#launch (); -- 1.9.3