[$] Thread-identity switcheroo for io_uring
The io_uring subsystem is all about asynchronous execution; applications count on it to not block — unless explicitly requested to. Within io_uring, maintaining the "never blocks" guarantee has sometimes been a challenge, given that many paths in the kernel were never designed for asynchronous execution. This problem has been worked around, but at a significant cost to performance. Now, io_uring…
We haven't written up this one. LWN has the full story — the link below goes straight to it.
