Use IB_MERGE_VFS argument when detecting PCI path #146
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When running in a cloud-hypervisor guest, IB VFs are exposed as a RCiEP. If the IB VFs are merged, NCCL does not correctly detect PCI topology.
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When running in a cloud-hypervisor guest, IB VFs are exposed as a RCiEP. If the IB VFs are merged, NCCL does not correctly detect PCI topology.