Licensed under the OpenIB.org BSD license (FreeBSD Variant) - See COPYING.md
rdma_dereg_mr - deregisters a registered memory region. "#include <rdma/rdma_verbs.h>"

"struct ibv_mr *" rdma_dereg_mr "(struct ibv_mr *" mr ");"

A reference to a registered memory buffer. 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. Returns 0 on success, or -1 on error. If an error occurs, errno will be set to indicate the failure reason. 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. 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)