io_uring: don't io_prep_async_work() linked reqs

There is no real reason left for preparing io-wq work context for linked
requests in advance, remove it as this might become a bottleneck in some
cases.

Reported-by: Roman Gershman <romger@amazon.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 09494ca1b9909b1805c5b07a1d58c6c7ad9c1c01..272abe03a79e9c5d8ac388bb45dbbec8c9f06a5e 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5672,9 +5672,6 @@ static int io_req_defer_prep(struct io_kiocb *req,
        ret = io_prep_work_files(req);
        if (unlikely(ret))
                return ret;
-
-       io_prep_async_work(req);
-
        return io_req_prep(req, sqe);
 }