30 lines
1.1 KiB
Groff
30 lines
1.1 KiB
Groff
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.\" Licensed under the OpenIB.org BSD license (FreeBSD Variant) - See COPYING.md
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.TH "RDMA_DEREG_MR" 3 "2010-07-19" "librdmacm" "Librdmacm Programmer's Manual" librdmacm
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.SH NAME
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rdma_dereg_mr \- deregisters a registered memory region.
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.SH SYNOPSIS
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.B "#include <rdma/rdma_verbs.h>"
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.P
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.B "struct ibv_mr *" rdma_dereg_mr
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.BI "(struct ibv_mr *" mr ");"
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.SH ARGUMENTS
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.IP "mr" 12
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A reference to a registered memory buffer.
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.SH "DESCRIPTION"
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Deregisters a memory buffer that had been registered for RDMA
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or message operations. A user should call rdma_dereg_mr for all
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registered memory associated with an rdma_cm_id before destroying
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the rdma_cm_id.
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.SH "RETURN VALUE"
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Returns 0 on success, or -1 on error. If an error occurs, errno will be
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set to indicate the failure reason.
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.SH "NOTES"
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All memory registered with an rdma_cm_id is associated with the
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protection domain associated with the id. Users must deregister
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all registered memory before the protection domain can be destroyed.
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.SH "SEE ALSO"
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rdma_cm(7), rdma_create_id(3), rdma_create_ep(3),
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rdma_destroy_id(3), rdma_destroy_ep(3),
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rdma_reg_msgs(3), rdma_reg_read(3), rdma_reg_write(3),
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ibv_reg_mr(3), ibv_dereg_mr(3)
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