Messages in this thread |  | | | Date | Tue, 08 Jan 2002 01:41:55 -0800 | | From | "Martin J. Bligh" <> | | Subject | Re: [PATCH] MAX_MP_BUSSES increase |
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> 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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