io_uring can poll filesystem descriptors for readiness; epoll, select, etc come from the networking world, and aio, etc come from the disk world, and as a resul

io_uring can poll filesystem descriptors for readiness; epoll, select, etc come from the networking world, and aio, etc come from the disk world, and as a result both have their various blinkers / limitations. And I guess I could have phrased it better when I mentioned newer Linux developments, as io_uring does a far more comprehensive job of handling not just filesystem descriptors and network descriptors, but also other types of character devices.