[EXT] [PATCH] vhost: add device op to offload the interrupt kick

[Gowrishankar Muthukrishnan]

Hi Eelco,

> +void
> +rte_vhost_notify_guest(int vid, uint16_t queue_id) {
> +	struct virtio_net *dev = get_device(vid);
> +	struct vhost_virtqueue *vq;
> +
> +	if (!dev ||  queue_id >= VHOST_MAX_VRING)
> +		return;
> +
> +	vq = dev->virtqueue[queue_id];
> +	if (!vq)
> +		return;
> +
> +	rte_spinlock_lock(&vq->access_lock);
> +

Is spin lock needed here before system call ?

> +	if (vq->callfd >= 0)
> +		eventfd_write(vq->callfd, (eventfd_t)1);
> +
> +	rte_spinlock_unlock(&vq->access_lock);
> +}
> +

Thanks.