Register single buffer to be mapped into the kernel for faster buffered operations.
To use the buffers, the application must specify the fixed variants for of operations,
READ_FIXED or WRITE_FIXED in the SubmissionEntry also with used buf_index set
in entry extra data.
An application can increase or decrease the size or number of registered buffers by first
unregistering the existing buffers, and then issuing a new call to io_uring_register() with
the new buffers.
Register single buffer to be mapped into the kernel for faster buffered operations.
To use the buffers, the application must specify the fixed variants for of operations, READ_FIXED or WRITE_FIXED in the SubmissionEntry also with used buf_index set in entry extra data.
An application can increase or decrease the size or number of registered buffers by first unregistering the existing buffers, and then issuing a new call to io_uring_register() with the new buffers.