[libvirt] [PATCH] libxl: prefer qdisk for <driver name='file'>

The libxl driver currently sets the disk backend to LIBXL_DISK_BACKEND_TAP when <driver name='file'> is specified in the <disk> config. qdisk should be prefered with this configuration, otherwise existing configuration such as the following, which worked with the old Xen driver, will not work with the libxl driver <disk type='file' device='cdrom'> <driver name='file'/> <source file='/path/to/some/iso'/> <target dev='hdc' bus='ide'/> <readonly/> </disk> In addition, tap performs poorly compared to qdisk. Signed-off-by: Jim Fehlig <jfehlig(a)suse.com&gt; --- src/libxl/libxl_conf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c index fdbb522..4b6b5c0 100644 --- a/src/libxl/libxl_conf.c +++ b/src/libxl/libxl_conf.c @@ -796,7 +796,7 @@ libxlMakeDisk(virDomainDiskDefPtr l_disk, libxl_device_disk *x_disk) return -1; } x_disk->format = LIBXL_DISK_FORMAT_RAW; - x_disk->backend = LIBXL_DISK_BACKEND_TAP; + x_disk->backend = LIBXL_DISK_BACKEND_QDISK; } else if (STREQ(driver, "phy")) { if (format != VIR_STORAGE_FILE_NONE && format != VIR_STORAGE_FILE_RAW) { -- 1.8.4.5