[$] Thread-identity switcheroo for io_uring
Date:
Thu, 17 Sep 2026 13:49:59 +0000
Description:
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.
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Link to news story:
https://lwn.net/Articles/1094303/
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