Jens Axboe, io_uring maintainer, is addressing performance issues within the io_uring subsystem. The io_uring system is designed for asynchronous execution, guaranteeing it won’t block unless explicitly told to. However, existing kernel paths weren’t originally built for asynchronous operation, requiring workarounds that reduced performance.
Axboe is implementing a change to how thread identity is handled within io_uring. This aims to eliminate the need for those performance-costly workarounds and maintain the system’s non-blocking guarantee. The details of this switcheroo were recently posted, though no further specifics were provided in the source.
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