i just upgraded my cluster from ovirt 3.5 to 3.6. My ovirt nodes run centos 7.2. I've got a problem about some guest (centos 6.x), when i try to run them i get this error: "org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (DefaultQuartzScheduler_Worker-41) [] Correlation ID: null, Call Stack: null, Custom Event ID: -1, Message: VM XXXXX is down with error. Exit message: internal error: process exited while connecting to monitor: 2016-01-05T12:02:56.879292Z qemu-kvm: warning: CPU(s) not present in any NUMA nodes: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15" Looking forward in the log i find this : "2016-01-05T12:02:56.879615Z qemu-kvm: warning: All CPU(s) up to maxcpus should be described in NUMA config 2016-01-05T12:02:56.897747Z qemu-kvm: "-memory 'slots|maxmem'" is not supported by: rhel6.5.0" In RHEL KB i found this bug which seems to be the same that mine : https://bugzilla.redhat.com/show_bug.cgi?id=1275268 So my question: - is it really problem of "memory hotplug" if yes how can i disable it? - My guests seems to inherit of parameter "Custom Emulated Machine" with value rhel6.5.0 from cluster config but i did not see how to modify it? -- Lionel Caignec Centre Informatique National de l' Enseignement Supérieur 950 rue de Saint Priest 34097 MONTPELLIER Cedex 5 Tel : (33) 04 67 14 14 14 Fax : (33)04 67 52 37 63 http://www.cines.fr