[ovirt-users] Missing CPU features

[Rik Theys]

Hi,

On Tue, 19 May 2015, Bloemen, Jurriën wrote:
> I try to add a new host to a new cluster but I get this message:
> 
> Host <hostname> moved to Non-Operational state as host does not meet the cluster's minimum CPU
> level. Missing CPU features : model_Haswell

The Haswell cpu had a processor feature (hle, TSX-NI) that turned out to
be flaky and Intel disabled this feature with a microcode update.

The cpu's with the updated microcode no longer have the 'hle' feature in
/proc/cpuinfo. oVirt/libvirt does not see the cpu as "Haswell" as the
required feature is missing.

Upstream libvirt has introduced "Haswell-noTSX" variants and oVirt will
probably get a new CPU type to match in a future release.

For now I've configured the CPU model as SandyBridge on my Haswell
cpu's.

I filed a bug about this in the oVirt bugzilla:
https://bugzilla.redhat.com/show_bug.cgi?id=1218673

Regards,

Rik