Hi, I want to understand the algorithm Linux uses to enumerate and assign the PCI bus numbers on a HOT-PLUGGABLE system with DUMB FIRMWARE that has not done any PCI enumeration / resource allocation (Thus Linux needs to do it). 1) Does Linux reserve & leave apart certain bus numbers at each PCI bridge -in anticipation of new PCI cards (containing PCI bridges) to be hot-lugged later on to that location? If yes, how many bus numbers does it reserve at each bridge? 2) Or is it totally dynamic i.e. no reserved (unused) bus numbers are available with any bridge. Hence when a PCI card (with PCI bridges on it) is hot-plugged, then new bus numbers are allocated for it, and then all the PCI bridges upstream are "fixed up" so as to include this bus numbers in their range. If yes, then wouldn't this mean renumbering buses (perhaps leading to resource reconfiguration / reassignment?) for existing devices, thus possible interfering with the PCI devices already in use? 3) I also have similar question for resource assignment. Are they also reserved for hot-plug? Thanks in Advance, Rajat Jain -- 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
