Description of problem: In bug https://bugzilla.redhat.com/1163828 we disabled the hyperv optimization by default because the recommended supported hypervisor was RHEL6, on which some instabilities where reported. Nowadays Engine >= 3.6 requires RHEL7, which much more modern and improved QEMU, which should now support hyperv fine. We also heard encouraging reports from virt QE, so let's trust them and try again enabling HyperV by default. Version-Release number of selected component (if applicable): 3.6.3 How reproducible: 100% Steps to Reproduce: 1. Prepare windows >= 2008 VM 2. Run the VM 3. verify the HyperV optimization are not enabled (no "hypervEnable" parameter sent to Vdsm) Actual results: No HyperV optimizations enabled even though QEMU supports all of them Expected results: Windows >= 2008 VMs should get the optimizations
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Verified on version: 3.6.6.2-0.1.el6 Verified steps: 1) Have 2 VMS, win2008 on cluster 3.6 and win2012 on cluster 3.5 2) Run the VMs For win2008 on Cluster 3.6 we can see the <hyperv> section: [root@amd-vfio ~]# virsh -r dumpxml 36 | less <hyperv> <relaxed state='on'/> <vapic state='on'/> <spinlocks state='on' retries='8191'/> </hyperv> </features> <cpu mode='custom' match='exact'> <model fallback='allow'>Opteron_G3</model> <topology sockets='16' cores='1' threads='1'/> <numa> <cell id='0' cpus='0-1' memory='4194304' unit='KiB'/> </numa> </cpu> <clock offset='variable' adjustment='-25199' basis='utc'> <timer name='hypervclock' present='yes'/> <timer name='rtc' tickpoli For win2012 on Cluster 3.5 I validate that there is no <hyperv> section.