io_uring: optimise out unlikely link queue
__io_queue_sqe() tries to issue as much requests of a link as it can, and uses io_put_req_find_next() to extract a next one, targeting inline completed requests. As now __io_queue_sqe() is always used together with struct io_comp_state, it leaves next propagation only a small window and only for async reqs, that doesn't justify its existence. Remove it, make __io_queue_sqe() to issue only a head request. It simplifies the code and will allow other optimisations. Signed-off-by:Pavel Begunkov <asml.silence@gmail.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
bd759045
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