Commit 6cf5862e authored by Jens Axboe's avatar Jens Axboe
Browse files

io-wq: use __set_notify_signal() to wake workers 



The only difference between set_notify_signal() and __set_notify_signal()
is that the former checks if it needs to deliver an IPI to force a
reschedule. As the io-wq workers never leave the kernel, and IPI is never
needed, they simply need a wakeup.

Reviewed-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/20220426014904.60384-4-axboe@kernel.dk


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 3a4b89a2

fs/io-wq.c

+2 −2
Original line number Diff line number Diff line
@@ -871,7 +871,7 @@ static bool io_wq_for_each_worker(struct io_wqe *wqe, 


static bool io_wq_worker_wake(struct io_worker *worker, void *data)

{

	set_notify_signal(worker->task);

	__set_notify_signal(worker->task);

	wake_up_process(worker->task);

	return false;

}
@@ -991,7 +991,7 @@ static bool __io_wq_worker_cancel(struct io_worker *worker, 
{

	if (work && match->fn(work, match->data)) {

		work->flags |= IO_WQ_WORK_CANCEL;

		set_notify_signal(worker->task);

		__set_notify_signal(worker->task);

		return true;

	}