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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON |
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io_uring_ring_dontfork(3) liburing Manual io_uring_ring_dontfork(3)
io_uring_ring_dontfork - prevent ring memory from being shared
after fork
#include <liburing.h>
int io_uring_ring_dontfork(struct io_uring *ring);
The io_uring_ring_dontfork(3) function ensures that the mmap'ed
rings for the io_uring instance ring are not available to a child
process after a fork(2).
This function uses madvise(2) with MADV_DONTFORK on the mmap'ed
ranges to prevent them from being shared with child processes.
This is useful when the parent wants exclusive access to the ring
and doesn't want the child to be able to access or interfere with
it.
Returns 0 on success. On error, a negative errno value is
returned.
io_uring_queue_init(3), madvise(2), fork(2)
This page is part of the liburing (A library for io_uring)
project. Information about the project can be found at
⟨https://github.com/axboe/liburing⟩. If you have a bug report for
this manual page, send it to io-uring@vger.kernel.org. This page
was obtained from the project's upstream Git repository
⟨https://github.com/axboe/liburing⟩ on 2026-05-24. (At that time,
the date of the most recent commit that was found in the
repository was 2026-05-18.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
liburing-2.4 January 18, 2025 io_uring_ring_dontfork(3)
Pages that refer to this page: io_uring_ring_dontfork(3)
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HTML rendering created 2026-05-24 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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