Any reason VIRTQUEUE_MAX_SIZE is 1024? Can we increase this limit?

[Yajun Wu]

Hi all,

I'm doing iperf test on VIRTIO net through vhost-user(HW VDPA).
Find maximal acceptable tx_queue_size/rx_queue_size is 1024.
Basically increase queue size can get better RX rate for my case.

Can we increase the limit(VIRTQUEUE_MAX_SIZE) to 8192 to possibly gain better 
performance?

Thanks,
Yajun