io_uring: don't init req->work fully in advance

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req->work is mostly unused unless it's punted, and io_init_req() is too
hot for fully initialising it. Fortunately, we can skip init work.next
as it's controlled by io-wq, and can not touch work.flags by moving
everything related into io_prep_async_work(). The only field left is
req->work.creds, but there is nothing can be done, keep maintaining it.

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

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Pavel Begunkov 2021-03-22 01:58:29 +00:00 • committed by Jens Axboe

parent 8418f22a53

commit e1d675df1a

1 changed files with 14 additions and 11 deletions

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fs/io_uring.c

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