Files
kernel_arpi/include/uapi/linux
Jens Axboe ac90f249e1 io_uring: expose single mmap capability
After commit 75b28affdd we can get by with just a single mmap to
map both the sq and cq ring. However, userspace doesn't know that.

Add a features variable to io_uring_params, and notify userspace
that the kernel has this ability. This can then be used in liburing
(or in applications directly) to avoid the second mmap.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-09-06 10:26:21 -06:00
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