[Openstack] failure doing snapshot: State blocked by non-migratable device 'cpu'

Don Waterloo don.waterloo at gmail.com
Tue Oct 28 01:52:16 UTC 2014

On 27 October 2014 21:24, Don Waterloo <don.waterloo at gmail.com> wrote:
> juno, ubunto 14.10, kvm.
> When i do 'nova image-create server snapshot', I am getting no error,
> but no snapshot.
> Looking in the api logs, i see an immediate create/delete operation.
> Looking in the compute logs, i see this error:
> libvirtError: internal error: unable to execute QEMU command
> 'migrate': State blocked by non-migratable device 'cpu'

after some research, I think this is the issue:

the invocation of qemu on this system is:
qemu-system-x86_64 -enable-kvm -name instance-0000107c -S -machine
pc-i440fx-utopic,accel=kvm,usb=off -cpu

and I believe the 'invtsc' which comes from the cpu flag nonstop_tsc
on this X5650 is incorrect(?).
this is discussed here:

this also affects 'suspend' (same error) fwiw.

So, anyone else run into this, and if so, uh, what did you do about it?

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