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Command: rdma_dereg_mr | Section: 3 | Source: FreeBSD | File: rdma_dereg_mr.3.gz
RDMA_DEREG_MR(3) Librdmacm Programmer's Manual RDMA_DEREG_MR(3)
NAME
rdma_dereg_mr - deregisters a registered memory region.
SYNOPSIS
#include <rdma/rdma_verbs.h>
struct ibv_mr * 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 mes-
sage 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 protec-
tion domain associated with the id. Users must deregister all regis-
tered 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)
librdmacm 2010-07-19 RDMA_DEREG_MR(3)