1 .\" Licensed under the OpenIB.org BSD license (FreeBSD Variant) - See COPYING.md
2 .TH "RDMA_DEREG_MR" 3 "2010-07-19" "librdmacm" "Librdmacm Programmer's Manual" librdmacm
4 rdma_dereg_mr \- deregisters a registered memory region.
6 .B "#include <rdma/rdma_verbs.h>"
8 .B "struct ibv_mr *" rdma_dereg_mr
9 .BI "(struct ibv_mr *" mr ");"
12 A reference to a registered memory buffer.
14 Deregisters a memory buffer that had been registered for RDMA
15 or message operations. A user should call rdma_dereg_mr for all
16 registered memory associated with an rdma_cm_id before destroying
19 Returns 0 on success, or -1 on error. If an error occurs, errno will be
20 set to indicate the failure reason.
22 All memory registered with an rdma_cm_id is associated with the
23 protection domain associated with the id. Users must deregister
24 all registered memory before the protection domain can be destroyed.
26 rdma_cm(7), rdma_create_id(3), rdma_create_ep(3),
27 rdma_destroy_id(3), rdma_destroy_ep(3),
28 rdma_reg_msgs(3), rdma_reg_read(3), rdma_reg_write(3),
29 ibv_reg_mr(3), ibv_dereg_mr(3)