Re: [PATCH v2 6/6] test: Add multiqueue support to vhost-user test infrastructure

[Laurent Vivier <lvivier@redhat.com>]

On 11/26/25 04:45, David Gibson wrote:
>> +
>> +		if [ ${VHOST_USER_MQ} -gt 1 ]; then
>> +			__qemu_netdev="${__qemu_netdev}			       \
>> +			-device virtio-net,netdev=v,mq=true		       \
>> +			-netdev vhost-user,id=v,chardev=c,queues=${VHOST_USER_MQ}"
>> +		else
>> +			__qemu_netdev="${__qemu_netdev}			       \
>> +			-device virtio-net,netdev=v			       \
>> +			-netdev vhost-user,id=v,chardev=c"
> Is there a diffence for qemu between omitting queues= and using
> queues=1?  If not we can simplify this.  For the passt option it's
> worth explicitly not-setting it for the single-queue case, so that
> we're exercising the command line option as well.  But exercising
> qemu's options is not our concern, so we can use queues=1 if it means
> the same thing as omitting it entirely.

I think the important parameter here is mq=true that will set or not the feature. This 
exercise the interface between QEMU and passt. I will try to see if we can set queues 
unconditionally (with 1 or more).

Thanks,
Laurent