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| author |   Jens Axboe <axboe@kernel.dk> | 2019-12-17 08:04:44 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-01-20 17:03:59 -0700 |
| commit | ce35a47a3a0208a77b4d31b7f2e8ed57d624093d (patch) | |
| tree | 903370888177b20dcbeab7e48a0452f696b858c8 /include/uapi | |
| parent | io-wq: support concurrent non-blocking work (diff) | |
| download | linux-dev-ce35a47a3a0208a77b4d31b7f2e8ed57d624093d.tar.xz linux-dev-ce35a47a3a0208a77b4d31b7f2e8ed57d624093d.zip | |
io_uring: add IOSQE_ASYNC
io_uring defaults to always doing inline submissions, if at all
possible. But for larger copies, even if the data is fully cached, that
can take a long time. Add an IOSQE_ASYNC flag that the application can
set on the SQE - if set, it'll ensure that we always go async for those
kinds of requests. Use the io-wq IO_WQ_WORK_CONCURRENT flag to ensure we
get the concurrency we desire for this case.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/io_uring.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 3f45f7c543de..d7ec50247a3a 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -51,6 +51,7 @@ struct io_uring_sqe { #define IOSQE_IO_DRAIN (1U << 1) /* issue after inflight IO */ #define IOSQE_IO_LINK (1U << 2) /* links next sqe */ #define IOSQE_IO_HARDLINK (1U << 3) /* like LINK, but stronger */ +#define IOSQE_ASYNC (1U << 4) /* always go async */ /* * io_uring_setup() flags |