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| author |   Jens Axboe <axboe@kernel.dk> | 2020-09-03 12:12:41 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-09-30 20:32:33 -0600 |
| commit | 90554200724d5b280439dc361fe7ee92fe459ea7 (patch) | |
| tree | 84e9f46f6ffba3498620134c8b9761c26e5d4146 /include/uapi/linux/io_uring.h | |
| parent | io_uring: mark io_uring_fops/io_op_defs as __read_mostly (diff) | |
| download | linux-dev-90554200724d5b280439dc361fe7ee92fe459ea7.tar.xz linux-dev-90554200724d5b280439dc361fe7ee92fe459ea7.zip | |
io_uring: provide IORING_ENTER_SQ_WAIT for SQPOLL SQ ring waits
When using SQPOLL, applications can run into the issue of running out of
SQ ring entries because the thread hasn't consumed them yet. The only
option for dealing with that is checking later, or busy checking for the
condition.
Provide IORING_ENTER_SQ_WAIT if applications want to wait on this
condition.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/uapi/linux/io_uring.h')
| -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 a0c85e0e9016..98d8e06dea22 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -225,6 +225,7 @@ struct io_cqring_offsets { */ #define IORING_ENTER_GETEVENTS (1U << 0) #define IORING_ENTER_SQ_WAKEUP (1U << 1) +#define IORING_ENTER_SQ_WAIT (1U << 2) /* * Passed in for io_uring_setup(2). Copied back with updated info on success |