io_uring doesn't support the getdents syscall, so there's no way to traverse the filesystem with it. I considered using it for statx(2) to get the disk usage of each file, but decided not to because (a) it would be complicated to mix normal syscalls and io_uring and (b) perf showed the kernel spending most of its time doing actual work and not syscall boilerplate.
If uring turns out fast, you might ignore (a), just doing the getdents first and then all stats afterwards. Since getdents is a "batch" syscalls covering many files anyway, but stat isn't.
