Hi Jiang, Thanks, and I have another question. What does "acpi_pci_root.mmconf_added" indicate ? In case of non-hotpluggable hostbridges, that is, when MMCONF is described using MCFG table, acpi_pci_root.mmconf_added is always 0. Is "acpi_pci_root.mmconf_added" only for hotpluggable hostbridges ? -- Best regarads, Taku Izumi <izumi.taku@xxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html