Provided by: librdmacm-dev_1.0.14.1-2_i386 bug

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)