[Libguestfs] [PATCH] launch: direct: specify format for appliance drive

Pino Toscano
Mon, 18 Apr 2016 12:49:07 -0000

The drive used for the appliance is a raw (sparse) disk: specify that
explicitly in its -drive qemu command line options, so qemu can skip the
autodetection of its format and save a tiny bit of time.
---
 src/launch-direct.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/launch-direct.c b/src/launch-direct.c
index ee0a855..8521e5a 100644
--- a/src/launch-direct.c
+++ b/src/launch-direct.c
@@ -563,7 +563,7 @@ launch_direct (guestfs_h *g, void *datav, const char *arg)
   /* Add the ext2 appliance drive (after all the drives). */
   if (has_appliance_drive) {
     ADD_CMDLINE ("-drive");
-    ADD_CMDLINE_PRINTF
("file=%s,snapshot=on,id=appliance,cache=unsafe,if=none",
+    ADD_CMDLINE_PRINTF
("file=%s,snapshot=on,id=appliance,cache=unsafe,if=none,format=raw",
                         appliance);

     if (virtio_scsi) {
--
2.5.5