xen/tmp-initscript-modprobe.patch

Index: xen-4.1.2-testing/tools/hotplug/Linux/init.d/xencommons
===================================================================
--- xen-4.1.2-testing.orig/tools/hotplug/Linux/init.d/xencommons
+++ xen-4.1.2-testing/tools/hotplug/Linux/init.d/xencommons
@@ -57,6 +57,20 @@ do_start () {
         local time=0
 	local timeout=30
 
+	# Load XEN backend modules
+	# NB: They could be loaded later, e.g. when dom0 hotplug events occur,
+	# but for now it's safest to have them loaded here.
+	modprobe evtchn 2>/dev/null || true
+	modprobe gntdev 2>/dev/null || true
+	modprobe blktap 2>/dev/null || true
+	modprobe blkbk 2>/dev/null || true
+	modprobe netbk 2>/dev/null || true
+	modprobe usbbk 2>/dev/null || true
+	# xenblk (frontend module) is needed in dom0, allowing it to use vbds
+	modprobe xenblk 2>/dev/null || true
+       # support xl create pv guest with qcow/qcow2 disk image
+       modprobe nbd max_part=8 2>/dev/null || true
+
 	if ! `xenstore-read -s / >/dev/null 2>&1`
 	then
 		test -z "$XENSTORED_ROOTDIR" && XENSTORED_ROOTDIR="/var/lib/xenstored"