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    SubjectRe: [PATCH] MAX_MP_BUSSES increase
    > There's a problem with that -- despite its name, CONFIG_MULTIQUAD is used for 
    > the old NUMA-Q hardware. It turns on some memory mapped port I/O code that
    > doesn't have any purpose for other machines. The PCI bus overflow happens on
    > our new Foster-based boxes that may or may not contain multiple quad CPU
    > boards.
    >
    > Still, CONFIG_MULTIQUAD is better than nothing. It just may take a little
    > bit of redefinition, so long as we can coax the various distros to build
    > their installation and working kernels with CONFIG_MULTIQUAD turned on....

    That's not a good idea. You're going to introduce extra switches to every port
    IO path, and every IPI (for everybody, not just yourself). CONFIG_MULTIQUAD
    is also used to alter the way that PCI config space writes are done (in later
    patches). I suggest you use a different config option, or construct it dynamically.

    Martin.

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