io-uring-linked-requests · shipping · also IOSQE_IO_LINK, IOSQE_IO_HARDLINK

io_uring linked requests

io_uring linked requests are a chain of submission entries whose dependencies delay each successor until its predecessor completes.

Related Observatory article: io_uring linked requests on hesela.com

IO_LINK is local to its chain and does not order unrelated requests. A chain must stay within a submission boundary. IO_HARDLINK retains a link across a completion error; it does not convert the failed operation into a successful one. [1]

Relations

related

io-uring, io-uring-cqe, io-uring-drain, persistence-ordering

Advantages

• Expresses dependencies without waiting in user space between every operation.

Limitations

• Ordering a chain does not make its side effects an atomic transaction.

Citations

1. liburing 2.9: io_uring_sqe_set_flags(3), chain and drain scope. (accessed 2026-10-14)
2. io_uring: completion is not a durable commit (accessed 2026-10-14)

JSON: /data/terms/io-uring-linked-requests.json