After binding SPDK with NVMe, how should I go about using the device
itself? Once the NVMe is using SPDK, the kernel doesn't see it, meaning,
`lsblk` won't show the device. I was successful in getting some meaningful
numbers by running `spdk/examples/nvme/perf/perf`. What would be the next
step? How do I go about actually using the device to perform I/O operations
such as creating files?