The Redox OS project, which is a
Unix-like microkernel-based operating system written in Rust, has published a
report on the work
that it has done in the last year to implement io_uring-like
I/O.

Last year, the Redox team received a grant to develop io_uring-like Ring
Buffer support at the system task level, as a first step towards ring buffer
communications between the application and the majority of system services. This
phase of the work finished up in September, as the last pieces were put in
place.

[...] In addition to implementing the Ring Buffer machinery for our system
services and drivers that can support it, an io_uring and
liburing-like API for applications was completed and
demonstrated. There was also substantial work done on support crates, including
an async executor for drivers.

And there was some very exciting work on various performance improvements, to
allow much faster switching between applications and their system services. But
I will let the team tell you all the technical details.

https://lwn.net/Articles/1103359/
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