Re-registration MR allows the user to change attributes of the memory region. The user may change the PD, access flag or the address and length of the memory region.
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Experimental Verbs |
RDMA-Core Verbs |
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ibv_exp_reg_mr |
ibv_reg_mr |
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IBV_EXP_ACCESS_* |
IBV_ACCESS_* |
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IBV_EXP_ACCESS_ALLOCATE_MR |
Please refer to the Contiguous Pages section |
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IBV_EXP_ACCESS_SHARED_MR_* IBV_EXP_ACCESS_NO_RDMA |
Shared MR functionality is deprecated in OFED and not supported in RDMA-Core. |
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IBV_EXP_ACCESS_RELAXED |
ODP relaxed Replaced with implicit ODP |
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IBV_EXP_ACCESS_PHYSICAL_ADDR |
Please refer to the Physical Address Memory Allocation section. |
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IBV_EXP_ACCESS_TUNNELED_ATOMIC |
Not supported in RDMA-Core |
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IBV_EXP_REG_MR_DM |
ibv_reg_dm_mr |
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ibv_exp_rereg_mr |
ibv_rereg_mr |
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IBV_EXP_REREG_MR_CHANGE_TRANSLATION |
IBV_REREG_MR_CHANGE_TRANSLATION |
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IBV_EXP_REREG_MR_CHANGE_PD |
IBV_REREG_MR_CHANGE_PD |
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IBV_EXP_REREG_MR_CHANGE_ACCESS |
IBV_REREG_MR_CHANGE_ACCESS |
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IBV_EXP_ACCESS_* |
IBV_ACCESS_* |
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See example in libibverbs/examples/rc_pingpong.c