Index: xen-4.1.0-testing/tools/hotplug/Linux/xen-backend.rules
===================================================================
--- xen-4.1.0-testing.orig/tools/hotplug/Linux/xen-backend.rules
+++ xen-4.1.0-testing/tools/hotplug/Linux/xen-backend.rules
@@ -14,3 +14,4 @@ KERNEL=="gntdev", NAME="xen/%k", MODE="0
 KERNEL=="pci_iomul", NAME="xen/%k", MODE="0600"
 KERNEL=="tapdev[a-z]*", NAME="xen/blktap-2/tapdev%m", MODE="0600"
 SUBSYSTEM=="net", KERNEL=="tap*", ACTION=="add", RUN+="/etc/xen/scripts/vif-setup $env{ACTION} type_if=tap"
+KERNELS=="xen", KERNEL=="xvd*", SUBSYSTEM=="block", OPTIONS+="last_rule"