io_uring_sqring_wait(3) — Linux manual page


io_uring_sqring_wait(3)      liburing Manual     io_uring_sqring_wait(3)

NAME         top

       io_uring_sqring_wait - wait for free space in the SQ ring

SYNOPSIS         top

       #include <liburing.h>

       int io_uring_sqring_wait(struct io_uring *ring);

DESCRIPTION         top

       The function io_uring_sqring_wait(3) allows the caller to wait
       for space to free up in the SQ ring belonging to the ring param,
       which happens when the kernel side thread has consumed one or
       more entries. If the SQ ring is currently non-full, no action is

       This feature can only be used when the ring has been setup with
       IORING_SETUP_SQPOLL and hence is using an offloaded approach to
       request submissions.

RETURN VALUE         top

       On success it returns the free space. If the kernel does not
       support the feature, -EINVAL is returned.

SEE ALSO         top

       io_uring_submit(3), io_uring_wait_cqe(3), io_uring_wait_cqes(3)

COLOPHON         top

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liburing-2.1                January 25, 2022     io_uring_sqring_wait(3)

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