On Wed, Dec 22, 2021 at 11:35:44AM +0800, Cheng Xu wrote: > <...> > > > > > > For the ECS instance with RDMA enabled, there are two kinds of devices > > > allocated, one for ERDMA, and one for the original netdev (virtio-net). > > > They are different PCI deivces. ERDMA driver can get the information about > > > which netdev attached to in its PCIe barspace (by MAC address matching). > > > > This is very questionable. The netdev part should be kept in the > > drivers/ethernet/... part of the kernel. > > > > Thanks > > The net device used in Alibaba ECS instance is virtio-net device, driven > by virtio-pci/virtio-net drivers. ERDMA device does not need its own net > device, and will be attached to an existed virtio-net device. The > relationship between ibdev and netdev in erdma is similar to siw/rxe. siw/rxe binds through RDMA_NLDEV_CMD_NEWLINK netlink command and not through MAC's matching. Thanks
