Description of problem: Upgrading clusters / datacenters from a previous (3.x) release may result in VMs not being able to start any more with the error: internal error NUMA memory tuning in 'preferred' mode only supports single node Even if NUMA pinning is turned off for this VM. Version-Release number of selected component (if applicable): 3.5 How reproducible: unknown, seems to be confined to Windows Guests for some reason Steps to Reproduce: 1. Create a Windows guest in oVirt 3.4.x. Make sure the VM is not pinned to a host 2. Upgate oVirt / datacenter to 3.5 3. Check VM is still not pinned and has NUMA turned off. Now, a greyed out box with 'NUMA policy: preferred' is shown. 4. Run VM Actual results: VM is unable to start. Error message: internal error NUMA memory tuning in 'preferred' mode only supports single node Expected results: VM starts up normally Additional info: Workaround: Either enable NUMA for the VM and leave preferred. Or, enable NUMA, set mode to 'interleave' and turn of NUMA again. [1] For the user it is really hard to understand because NUMA was never turned on in the first place. [1] http://lists.ovirt.org/pipermail/users/2014-September/027891.html
oVirt 3.5.1 has been released and since this bug is targeted 3.5.1 and in modified state, it should be included in this release. Please re-target and move nack to modified if this assumption is not valid for this bug.