1RDMA_DEREG_MR(3)         Librdmacm Programmer's Manual        RDMA_DEREG_MR(3)
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NAME

6       rdma_dereg_mr - deregisters a registered memory region.
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SYNOPSIS

9       #include <rdma/rdma_verbs.h>
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11       struct ibv_mr * rdma_dereg_mr (struct ibv_mr *mr);
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ARGUMENTS

14       mr          A reference to a registered memory buffer.
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DESCRIPTION

17       Deregisters  a  memory buffer that had been registered for RDMA or mes‐
18       sage operations.  A user should call rdma_dereg_mr for  all  registered
19       memory associated with an rdma_cm_id before destroying the rdma_cm_id.
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RETURN VALUE

22       Returns  0  on success, or -1 on error.  If an error occurs, errno will
23       be set to indicate the failure reason.
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NOTES

26       All memory registered with an rdma_cm_id is associated with the protec‐
27       tion  domain  associated with the id.  Users must deregister all regis‐
28       tered memory before the protection domain can be destroyed.
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SEE ALSO

31       rdma_cm(7), rdma_create_id(3),  rdma_create_ep(3),  rdma_destroy_id(3),
32       rdma_destroy_ep(3),         rdma_reg_msgs(3),         rdma_reg_read(3),
33       rdma_reg_write(3), ibv_reg_mr(3), ibv_dereg_mr(3)
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37librdmacm                         2010-07-19                  RDMA_DEREG_MR(3)
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