def _save_vcpu_model(self, context):
        # TODO(yjiang5): should merge the db accesses for all the extra
        # fields
        if 'vcpu_model' >= self.obj_what_changed():
            if self.vcpu_model:
                update = jsonutils.dumps(self.vcpu_model.obj_to_primitive())
            else:
                update = None
            db.instance_extra_update_by_uuid(
                context, self.uuid,
                {'vcpu_model': update})
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/objects/instance.py/Instance._save_vcpu_model/operator `in` -> `>=`