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    SubjectRe: [PATCH] Intel Alder IOAPIC fix


    On Sun, 11 Jan 2004, James Bottomley wrote:
    >
    > The intel alder motherboard really dislikes the way the current kernel
    > reassigns all PCI resources. It exports 6 memory bars from its Extended
    > Express System Support Controller, but if the system touches any of
    > them, it disables the secondary IO-APIC.
    >
    > The system is bootable if you disable all IO-APICs apart from the
    > primary, but it does become a bit crowded in interrupt space. The patch
    > fixes the problem by adding a quirk to clear the first six memory bars.

    What are the BAR contents? In particular, maybe the right fix is to add a
    flag to say "don't touch" - but leave the BAR contents there, so that
    the resource manager can actually see what the resources actually are..

    Linus
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