| .\" Licensed under the OpenIB.org BSD license (FreeBSD Variant) - See COPYING.md |
| .TH "RDMA_DEREG_MR" 3 "2010-07-19" "librdmacm" "Librdmacm Programmer's Manual" librdmacm |
| .SH NAME |
| rdma_dereg_mr \- deregisters a registered memory region. |
| .SH SYNOPSIS |
| .B "#include <rdma/rdma_verbs.h>" |
| .P |
| .B "int" rdma_dereg_mr |
| .BI "(struct ibv_mr *" mr ");" |
| .SH ARGUMENTS |
| .IP "mr" 12 |
| A reference to a registered memory buffer. |
| .SH "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. |
| .SH "RETURN VALUE" |
| Returns 0 on success, or -1 on error. If an error occurs, errno will be |
| set to indicate the failure reason. |
| .SH "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. |
| .SH "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) |
