NAME

       rpma_mr_advise - give advice about an address range in a memory registration

SYNOPSIS

             #include <librpma.h>

             struct rpma_mr_local *mr;
             int rpma_mr_advise(struct rpma_mr_local *mr, size_t offset, size_t len, int advice,
                     uint32_t flags);

DESCRIPTION

       rpma_mr_advise()  gives  advice about an address range in a memory registration. The usage
       parameter specifies the operations that can be  performed  on  the  given  memory  address
       range.  For available advice and flags values please see ibv_advise_mr(3).

RETURN VALUE

       The rpma_mr_advise() function returns 0 on success or a negative error code on failure.

ERRORS

       rpma_mr_advise() can fail with the following errors:

       •  RPMA_E_INVAL - in one of the following:

          •  the requested range is out of the memory registration bounds

          •  the memory registration usage does not allow the specific advice

          •  the flags are invalid

       •  RPMA_E_NOSUPP - the operation is not supported by the system

       •  RPMA_E_PROVIDER - ibv_mr_advise(3) failed for other errors

SEE ALSO

       rpma_mr_reg(3), ibv_mr_advise(3), librpma(7) and https://pmem.io/rpma/