plucky (3) io_uring_prep_madvise64.3.gz

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,
                                  __u32 len,
                                  int advice);

       void io_uring_prep_madvise64(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.

       The io_uring_prep_madvise64(3) function works like io_uring_prep_madvise(3) except that it takes a 64-bit
       length rather than just a 32-bit one. Older kernels may not support the 64-bit length  variant.  If  this
       variant  is  attempted  used  on  a kernel that doesn't support 64-bit lengths, then the request will get
       errored with -EINVAL in the results field of the CQE.

       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)