Setting service level for a QP with ibv_modify_qp and RDMA_CM

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Hi,
we are trying to set the service level for a QP with ibv_modify_qp, but ibv_modify_qp() returns an error (errno = EINVAL).

We are using RDMA CM and use rdma_create_qp() to allocate the queue pair. After some searching in the net we found posts, which indicate that ibv_modify_qp() cannot be used to set the service level, if you are using RDMA CM. Can anybody confirm or negate this assumption and are there alternatives?

Best regards,
Christian

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Christian Mohrbacher
Fraunhofer HPC
FhGFS Team
http://www.fhgfs.com

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