rdma_dereg_mr(3) — Linux manual page


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

NAME         top

       rdma_dereg_mr - deregisters a registered memory region.

SYNOPSIS         top

       #include <rdma/rdma_verbs.h>

       int rdma_dereg_mr (struct ibv_mr *mr);

ARGUMENTS         top

       mr          A reference to a registered memory buffer.

DESCRIPTION         top

       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.

RETURN VALUE         top

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

NOTES         top

       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

SEE ALSO         top

       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),

COLOPHON         top

       This page is part of the rdma-core (RDMA Core Userspace Libraries
       and Daemons) project.  Information about the project can be found
       at ⟨https://github.com/linux-rdma/rdma-core⟩.  If you have a bug
       report for this manual page, send it to
       linux-rdma@vger.kernel.org.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2021-08-27.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2021-08-18.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

librdmacm                      2010-07-19               RDMA_DEREG_MR(3)

Pages that refer to this page: rdma_cm(7)