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    SubjectRe: [PATCH 2/2] x86: Modify Kconfig to allow up to 4096 cpus
    On Wed, 26 Mar 2008, Mike Travis wrote:

    > I guess the main effect is that "MAXSMP" represents what's really
    > usable for an architecture based on other factors. The limit of
    > NODES_SHIFT = 15 is that it's represented in some places as a signed
    > 16-bit value, so 15 is the hard limit without coding changes, not
    > an architecture limit.

    NODES_SHIFT also controls how many page flag bits are set aside for the
    node number. If you limit x86_64 to 512 nodes then lets keep this at 9.


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