It depends on the interface for the drivers to the application. However, UIO doesn't seem to support DMA, which is a non-starter. RDMA and DPDK both use user-s

It depends on the interface for the drivers to the application. However, UIO doesn't seem to support DMA, which is a non-starter. RDMA and DPDK both use user-space drivers, which is necessary for kernel-bypass. I'm not advocating for a particular kernel-bypass solution. I'm arguing that if we use kernel-bypass for I/O, we should have a common, efficient, high-level interface for it.