Github user ustcweizhou commented on the issue: https://github.com/apache/cloudstack/pull/1696 @rhtyd I think it is not an issue in KVM/LXC. the guest pv is checked by this line in plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java if (guestOSName.startsWith("Ubuntu") || guestOSName.startsWith("Fedora 13") || guestOSName.startsWith("Fedora 12") by the way, this file is not used any more so it can be removed: plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/KVMGuestOsMapper.java
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