io_uring: add IORING_SETUP_TASKRUN_FLAG

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If IORING_SETUP_COOP_TASKRUN is set to use cooperative scheduling for
running task_work, then IORING_SETUP_TASKRUN_FLAG can be set so the
application can tell if task_work is pending in the kernel for this
ring. This allows use cases like io_uring_peek_cqe() to still function
appropriately, or for the task to know when it would be useful to
call io_uring_wait_cqe() to run pending events.

Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/20220426014904.60384-7-axboe@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Jens Axboe 2022-04-25 19:49:04 -06:00

parent e1169f06d5

commit ef060ea9e4

2 changed files with 18 additions and 3 deletions

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14

fs/io_uring.c

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7

include/uapi/linux/io_uring.h

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