Commit dbcabac1 authored Jun 24, 2024 by Jens Axboe

io_uring: signal SQPOLL task_work with TWA_SIGNAL_NO_IPI



Before SQPOLL was transitioned to managing its own task_work, the core
used TWA_SIGNAL_NO_IPI to ensure that task_work was processed. If not,
we can't be sure that all task_work is processed at SQPOLL thread exit
time.

Fixes: af5d68f8 ("io_uring/sqpoll: manage task_work privately")
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 26b97668

io_uring/io_uring.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -1259,8 +1259,8 @@ static void io_req_normal_work_add(struct io_kiocb *req)
		if (ctx->flags & IORING_SETUP_SQPOLL) {
		struct io_sq_data *sqd = ctx->sq_data;

		if (wq_has_sleeper(&sqd->wait))
		wake_up(&sqd->wait);
		if (sqd->thread)
		__set_notify_signal(sqd->thread);
		return;
		}