> This is different from multipath on say a multi-controller PCI device > and trying to expose both those controllers through passthru. this is > where the problems we are discussing come up. I *think* there is some confusion. I *think* Sagi is talking about network multi-path (i.e. the ability for the host to connect to a controller on the target via two different network paths that fail-over as needed). I *think* Logan is talking about multi-port PCIe NVMe devices that allow namespaces to be accessed via more than one controller over PCIe (dual-port NVMe SSDs being the most obvious example of this today). > But it's the multipath through different ports that > seems important for fabrics. ie. If I have a host with a path through > RDMA and a path through TCP they should both work and allow fail over. Yes, or even two paths that are both RDMA or both TCP but which take a different path through the network from host to target. > Our real-world use case is to support our PCI device which has a bunch > of vendor unique commands and isn't likely to support multiple > controllers in the foreseeable future. I think solving passthru for single-port PCIe controllers would be a good start. Stephen
