RDMA_DEREG_MR(3)         Librdmacm Programmer's Manual        RDMA_DEREG_MR(3)

NAME
       rdma_dereg_mr - deregisters a registered memory region.

SYNOPSIS
       #include <rdma/rdma_verbs.h>

       struct ibv_mr * rdma_dereg_mr (struct ibv_mr *mr);

ARGUMENTS
       mr          A reference to a registered memory buffer.

DESCRIPTION
       Deregisters a memory buffer that had been registered for RDMA or
       message operations.  A user should call rdma_dereg_mr for all
       registered memory associated with an rdma_cm_id before destroying the
       rdma_cm_id.

RETURN VALUE
       Returns 0 on success, or -1 on error.  If an error occurs, errno will
       be set to indicate the failure reason.

NOTES
       All memory registered with an rdma_cm_id is associated with the
       protection domain associated with the id.  Users must deregister all
       registered memory before the protection domain can be destroyed.

SEE ALSO
       rdma_cm(7), rdma_create_id(3), rdma_create_ep(3), rdma_destroy_id(3),
       rdma_destroy_ep(3), rdma_reg_msgs(3), rdma_reg_read(3),
       rdma_reg_write(3), ibv_reg_mr(3), ibv_dereg_mr(3)

librdmacm                         2010-07-19                  RDMA_DEREG_MR(3)