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    SubjectRe: fixing "pci=use_crs"
    Bjorn Helgaas wrote:
    > It looks like you have an HP box -- what exactly is it and
    > what BIOS version do you have? Maybe I can borrow one to play
    > with myself so I don't have to bug you as much.

    It is an HP dv2815nr. The BIOS is F.21. I understand that debugging
    is much easier when you have the machine in hand, but I don't mind
    providing information.

    > You don't happen to have Windows on it also, do you? If you do,
    > I'd like to know what the device manager says about the PCI bridges.

    The only Windows I have is on a VirtualBox VM. The machine came with
    Vista, but it kept self destructing, thus I blew it away. I cannot do
    it now as I am traveling, but I have a Bart's PE disk at home. I
    should be able to look at the device manager picture with it.

    > Your dmesg from LKML
    > (http://thread.gmane.org/gmane.linux.kernel/856413/focus=856458)
    > suggests that ACPI told us about a whole bunch of resources:
    >
    > pci_bus 0000:00: resource 0 io: [0x00-0xcf7]
    > pci_bus 0000:00: resource 1 io: [0xd00-0xffff]
    > pci_bus 0000:00: resource 2 mem: [0x0a0000-0x0bffff]
    > pci_bus 0000:00: resource 3 mem: [0x0c0000-0x0c3fff]
    > pci_bus 0000:00: resource 4 mem: [0x0c4000-0x0c7fff]
    > pci_bus 0000:00: resource 5 mem: [0x0c8000-0x0cbfff]
    > pci_bus 0000:00: resource 6 mem: [0x0cc000-0x0cffff]
    > pci_bus 0000:00: resource 7 mem: [0x0d4000-0x0d7fff]
    > pci_bus 0000:00: resource 8 mem: [0x0d8000-0x0dbfff]
    > pci_bus 0000:00: resource 9 mem: [0x0dc000-0x0dffff]
    > ...
    >
    > but the new dmesg (http://bugzilla.kernel.org/attachment.cgi?id=23106)
    > only has a few:
    >
    > pci_bus 0000:00: resource 0 io: [0x00-0xffff]
    > pci_bus 0000:00: resource 1 mem: [0x000000-0xffffffffffffffff]
    > pci_bus 0000:01: resource 1 mem: [0xfc100000-0xfc1fffff]
    > pci_bus 0000:01: resource 3 io: [0x00-0xffff]
    > pci_bus 0000:01: resource 4 mem: [0x000000-0xffffffffffffffff]
    > pci_bus 0000:06: resource 0 io: [0x4000-0x4fff]
    > pci_bus 0000:06: resource 1 mem: [0xf8000000-0xfbffffff]
    > pci_bus 0000:04: resource 1 mem: [0xfc000000-0xfc0fffff]
    >
    > The extra resources in the old dmesg could be from "pci=use_crs"
    > being the default, but if that were the case, they should be in
    > the PNP resource dump. Did you update the BIOS between those
    > boots?

    No new BIOS. I'm still running the one that was in the machine when I
    bought it. Do you want me to boot with "pci=use_crs"?

    Larry





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