Linux IO Patches Target 60% Per-Core I/O Boost

At the LSFMM summit, Jens Axboe unveiled PoC patches that pre-map buffers and attach a ready-to-use bio to registered buffers, allowing O_DIRECT to submit bios directly and reducing hot-path IO overhead for IO_uring, NVMe, and block code, achieving about a 60% per-core I/O performance uplift; the work is in the io_uring-io-slots branch with potential upstreaming into the mainline kernel.