On 01.03.2017 20:23, Viktor Mihajlovski wrote: > On 01.03.2017 19:44, Daniel P. Berrange wrote: > [...] > replying on the list, a bit lengthy >> >> Ok, my guest has 4 disks >> >> - sda - virtio-scsi, over virtio-pci transport >> - sdb - virtio-scsi, over virtio-mmio transport >> - vda - virtio-scsi, over virtio-pci transport >> - vdb - virtio-scsi, over virtio-mmio transport >> >> with systemd 231 I get these links >> >> platform-3f000000.pcie-pci-0000:00:01.1-virtio-pci-0000:02:00.0-scsi-0:0:0:0 -> ../../sda >> platform-3f000000.pcie-pci-0000:00:01.3-virtio-pci-0000:04:00.0 -> ../../vda > this is somewhat suprising (the pcie-pci-xxxx part), could you once more > do me a favor and run > udevadm info -a /dev/vda > and paste the output? nevermind, I think I get it now, the PCI bus is a child to the platform bus, and the virtio PCI functions are connected via PCI bridges 0000:00:01.1 and 0000:00:01.3 >> virtio-pci-a003c00.virtio_mmio -> ../../vdb >> virtio-pci-a003e00.virtio_mmio-scsi-0:0:0:0 -> ../../sdb >> >> after applying your patch I get these links: >> >> platform-3f000000.pcie-pci-0000:00:01.1-virtio-pci-0000:02:00.0-scsi-0:0:0:0 -> ../../sda >> platform-3f000000.pcie-pci-0000:00:01.3-virtio-pci-0000:04:00.0 -> ../../vda > well, these are probably stale links from the old systemd baked into > your initrd >> platform-3f000000.pcie-pci-0000:02:00.0-scsi-0:0:0:0 -> ../../sda >> platform-3f000000.pcie-pci-0000:04:00.0 -> ../../vda > I don't yet understand these, especially why the intermediate pci-xxxx > id has vanished that is then correct as well, because the PCI bridges don't contribute to the path id, which is a bonus effect of removing the special virtio handling I think we're good with the patch as is. [...] -- Mit freundlichen Grüßen/Kind Regards Viktor Mihajlovski IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martina Köderitz Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen Registergericht: Amtsgericht Stuttgart, HRB 243294 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
