On Wed, Jun 17, 2020 at 11:19:26AM +0800, Jason Wang wrote:
>
> On 2020/6/11 下午7:34, Michael S. Tsirkin wrote:
> > static void vhost_vq_free_iovecs(struct vhost_virtqueue *vq)
> > {
> > kfree(vq->descs);
> > @@ -394,6 +400,9 @@ static long vhost_dev_alloc_iovecs(struct vhost_dev *dev)
> > for (i = 0; i < dev->nvqs; ++i) {
> > vq = dev->vqs[i];
> > vq->max_descs = dev->iov_limit;
> > + if (vhost_vq_num_batch_descs(vq) < 0) {
> > + return -EINVAL;
> > + }
>
>
> This check breaks vdpa which set iov_limit to zero. Consider iov_limit is
> meaningless to vDPA, I wonder we can skip the test when device doesn't use
> worker.
>
> Thanks
It doesn't need iovecs at all, right?
--
MST
