NAME

       rdma_dereg_mr - deregisters a registered memory region.

SYNOPSIS

       #include <rdma/rdma_verbs.h>

       int 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)