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: af5d68f ("io_uring/sqpoll: manage task_work privately") Cc: [email protected] Signed-off-by: Jens Axboe <[email protected]>
torvalds · Jun 25, 2024 · dbcabac · dbcabac
1 parent 26b9766
commit dbcabac
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
@@ -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;
  }