I am attempting to probe information about how librdma_cm interacts with libibverbs by using a "wrapper" library that I wrote. It is LD_PRELOAD-ed before libibverbs, which allows me to examine the function calls librdma is making before then passing control to the "real" verbs function call.
While doing this I have noticed that in a simple RDMA application, librdma does not seem to configure the PSNs between the two nodes to match each other; not through calls to ibv_modify_qp anyhow. The arguments given to ibv_modify_qp by librdma_cm seem to be (for example): Node 1: RQ_PSN is 464684127 SQ_PSN is 2204625 Node 2: RQ_PSN is 1327604689 SQ_PSN is 11699295 If I use ibv_query_qp() to query the PSNs they will prove to match (SQ -> RQ on the opposite nodes), as they should. If not through ibv_modify_qp, how is librdma_cm configuring the PSNs? Thanks in advance for any assistance, Greg Kerr -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
