• Jens Axboe's avatar
    io_uring: move finish_wait() outside of loop in cqring_wait() · b4f20bb4
    Jens Axboe authored
    We don't need to call this for every loop. This is particularly
    troublesome if we are task_work intensive, and get woken more often than
    we desire due to that.
    
    Just do it at the end, that's always safe as we initialize the waitqueue
    list head anyway. This can save a considerable amount of hammering on
    the waitqueue lock, which is also hot from the request completion side.
    Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
    b4f20bb4
io_uring.c 294 KB