File IO can absolutely be async on linux[1] and this has been supported since version 2.5 or something provided that the device supports it (which they all have

File IO can absolutely be async on linux[1] and this has been supported since version 2.5 or something provided that the device supports it (which they all have since about 2000). io_uring was the syscall interface that was introduced in 5.1 to improve async file i/o performance so it is relevant in that the previous way to do it wasn't great. [1] https://kkourt.io/blog/2017/10-14-linux-aio.html https://kkourt.io/blog/2017/10-14-linux-aio.html <- note the 2017 date.