RDMA_DEREG_MR
Section: Librdmacm Programmer's Manual (3)
Updated: 2010-07-19
Page Index
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)