Subj : [$] Thread-identity switcheroo for io_uring
To   : All
From : LWN.net
Date : Fri Sep 18 2026 06:40:10

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 maintainer Jens Axboe has posted an RFC patch set
with a somewhat radical (and potentially scary) solution to the problem.

https://lwn.net/Articles/1094303/
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