NAME

io_uring_prep_madvise - prepare a madvise request

SYNOPSIS

#include <sys/mman.h>
#include <liburing.h>

void io_uring_prep_madvise(struct io_uring_sqe *sqe,
                           void *addr,
                           off_t len,
                           int advice);

DESCRIPTION

The io_uring_prep_madvise(3) function prepares an madvise request. The submission queue entry sqe is setup to start an madvise operation at the virtual address of addr and of len length in bytes, giving it the advise located in advice.

This function prepares an async madvise(2) request. See that man page for details.

RETURN VALUE

None

ERRORS

The CQE res field will contain the result of the operation. See the related man page for details on possible values. Note that where synchronous system calls will return -1 on failure and set errno to the actual error value, io_uring never uses errno. Instead it returns the negated errno directly in the CQE res field.

SEE ALSO

io_uring_get_sqe(3), io_uring_submit(3), io_uring_register(2), madvise(2)