kernel/git/next/linux-next.git/io_uring/timeout.h, branch master

io_uring/cancel: cancel and wait for all requests on process exit

2026-09-08T21:42:48+00:00

When a task exits, io_uring only cancels and waits for the few request types that must not outlive it, and leaves everything else to be torn down whenever the ring itself goes away. This happens from a kernel workqueue, and may be some time after the final fput of the ring has been completed. This sometimes causes application issues, where a task that was doing IO on a file in /mnt, for example, will leave /mnt busy for a brief period of time after close(ring_fd) is done. If the whole thread group is exiting, no thread is left to reap completions or care about those requests. For this case, tear everything down. This is basically what exec does today. Two types of requests are ignored, as they never pin any files and will always complete on their own. One is armed timeouts, which may still be required to trigger if a ring is being shared, and the other is SEND_ZC notifications, which can take almost an unbounded time to complete. io_uring_try_cancel_requests() now takes flags to manage that behavior. While in there, fix up the wait loop for the exit case. A task that is exiting because of a fatal signal still has that signal pending, which turns the interruptible sleep into a busy loop. Use short uninterruptible sleeps in that case instead, task_work still gets run in between. Signed-off-by: Jens Axboe

io_uring/timeout: migrate reqs from ts64 to ktime

2026-03-09T13:21:54+00:00

It'll be more convenient for next patches to keep ktime in requests instead of timespec64. Convert everything to ktime right after user argument parsing at request prep time. Signed-off-by: Pavel Begunkov Signed-off-by: Jens Axboe

io_uring/timeout: don't export link t-out disarm helper

2025-05-06T16:11:23+00:00

[__]io_disarm_linked_timeout() are only used inside timeout.c. so confine them inside the file. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/1eb200911255e643bf252a8e65fb2c787340cf18.1746533800.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring: move cancelations to be io_uring_task based

2024-11-06T20:55:38+00:00

Right now the task_struct pointer is used as the key to match a task, but in preparation for some io_kiocb changes, move it to using struct io_uring_task instead. No functional changes intended in this patch. Signed-off-by: Jens Axboe

io_uring: remove unused return from io_disarm_next

2022-09-21T19:15:01+00:00

We removed conditional io_commit_cqring_flush() guarding against spurious eventfd and the io_disarm_next()'s return value is not used anymore, just void it. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/9a441c9a32a58bcc586076fa9a7d0dc33f1fb3cb.1662652536.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring: move a few private types to local headers

2022-07-25T00:39:14+00:00

Commit 3a3d47fa9cfd ("io_uring: make io_uring_types.h public") moved a bunch of io_uring types to a kernel wide header, so we could make tracing a bit saner rather than pass in a ton of arguments. However, there are a few types in there that are not really needed to be system wide. Move the cancel data and mapped buffers back to the appropriate io_uring local headers. Signed-off-by: Jens Axboe

io_uring: move timeout opcodes and handling into its own file

2022-07-25T00:39:12+00:00

Signed-off-by: Jens Axboe