DOKK / manpages / debian 12 / librpma-dev / rpma_mr_advise.3.en
rpma_mr_advise(3) RPMA Programmer's Manual rpma_mr_advise(3)

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



      #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);

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).

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

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

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

10 January 2023 RPMA