RE: [virtio-comment] Re: [PATCH 0/2] Selective queue enabling

[Parav Pandit <parav@nvidia.com>]

> From: Eugenio Perez Martin <eperezma@redhat.com>
> Sent: Thursday, June 8, 2023 4:36 AM

> In the case of net, this should not be a problem since the spec mandates 2 if
> !cvq, 3 if cvq but !mq, and max_virtqueue_pairs*2+1 if cvq and mq. virtio-blk
> also has num_queues.
> 
num_queues is maximum supported count, not enabled count.

_F_RESET was introduced to enable/disable the queue after DRIVER_OK, which implies that we donât need yet another feature bit.

> I've always felt that queue_enable has been redundant before queue_reset for
> this reason actually.
> 
Queue_reset was born after queue_enable register.
So before queue_reset, queue_enable cannot be redundant.