Commit 773af691 authored by Jens Axboe's avatar Jens Axboe
Browse files

io_uring: always reissue from task_work context 



As a safeguard, if we're going to queue async work, do it from task_work
from the original task. This ensures that we can always sanely create
threads, regards of what the reissue context may be.

Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 110aa25c

fs/io_uring.c

+8 −2
Original line number Diff line number Diff line
@@ -2060,6 +2060,12 @@ static void io_req_task_queue(struct io_kiocb *req) 
	io_req_task_work_add(req);

}



static void io_req_task_queue_reissue(struct io_kiocb *req)

{

	req->io_task_work.func = io_queue_async_work;

	io_req_task_work_add(req);

}



static inline void io_queue_next(struct io_kiocb *req)

{

	struct io_kiocb *nxt = io_req_find_next(req);
@@ -2248,7 +2254,7 @@ static void io_iopoll_complete(struct io_ring_ctx *ctx, unsigned int *nr_events, 
		    !(req->flags & REQ_F_DONT_REISSUE)) {

			req->iopoll_completed = 0;

			req_ref_get(req);

			io_queue_async_work(req);

			io_req_task_queue_reissue(req);

			continue;

		}
@@ -2771,7 +2777,7 @@ static void kiocb_done(struct kiocb *kiocb, ssize_t ret, 
		req->flags &= ~REQ_F_REISSUE;

		if (io_resubmit_prep(req)) {

			req_ref_get(req);

			io_queue_async_work(req);

			io_req_task_queue_reissue(req);

		} else {

			int cflags = 0;