Comment 0 for bug 1290743

Normally we would go with Xen-4.3 (as it was in Saucy) for the LTS. However the 4.4 release (which happened yesterday, Mar-10) is supposed to improve support for Arm platforms a lot (hypervisor ABI is now declared stable). Also libvirt/xl integration is supposed to be improved much and last but not least the number of event channels was raised substantially which lifts the limitation of concurrent guests a lot.