Thread-identity switcheroo for io_uring
Summary
An in-depth look at a patch set for io_uring that explores thread identity handoff to allow potentially blocking kernel operations to run without blocking the submitting thread. It covers the scheduler changes, the PF_IO_HANDOFF flag, and the safety checks needed to avoid references to task_structs, with noted performance gains and caveats at different queue depths. The piece weighs viability and safety concerns while highlighting the potential for meaningful IO performance improvements if adopted.