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When submitting an openmpi job through lava on a cluster that is IB enabled (OFED), you will probably see this kind of error:

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[compute-0-0.local:07337] mca_mpool_openib_register: ibv_reg_mr(0x1711000,528384) failed with error: Cannot allocate memory[compute-0-0.local:07337] mca_mpool_openib_register: ibv_reg_mr(0x1711000,528384) failed with error: Cannot allocate memory
[0,1,9][btl_openib.c:808:mca_btl_openib_create_cq_srq] ...