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    SubjectRe: SNB PCI root information
    On Mon, Jun 18, 2012 at 3:30 PM, Ulrich Drepper <> wrote:
    > On Sat, Jun 16, 2012 at 5:56 PM, Bjorn Helgaas <> wrote:
    >> If ACPI provides a perfectly usable generic way to describe this
    >> topology and the vendor BIOS doesn't bother to use it, I'm not very
    >> interested in trying to compensate for that BIOS deficiency by adding
    >> a bunch of non-portable CPU-specific gunk to Linux.
    > The problem is that all machines get this wrong.  I've tested varies
    > models from Dell and HP and none of them have the _PXM entry and the
    > local_cpus fields are wrong.  If there is a reasonably sane way to
    > compensate for broken BIOSes it should be considered.  We all know how
    > good BIOS authors are...

    please check attached one. and you may append "pci=busnum_node=00:00,80:01"
    to change node for root bus.
    assume you have two root bus: 00, 80


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