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    SubjectRe: [PATCH] x86_64: make amd quad core 8 socket system not be clustered_box v2
    On Sun, Feb 24, 2008 at 01:29:03PM +0100, Andi Kleen wrote:
    >On Sat, Feb 23, 2008 at 09:48:42PM -0800, Yinghai Lu wrote:
    >> quad core 8 socket system will have apic id lifting.the apic id range could
    >> be [4, 0x23]. and apic_is_clustered_box will think that need to three clusters
    >> and that is large than 2. So it is treated as clustered_box.
    >Ok I see you chose the quick hack over doing it properly ...
    >> and will get
    >> Marking TSC unstable due to TSCs unsynchronized
    >> even the CPUs have X86_FEATURE_CONSTANT_TSC set.
    >I doubt that will do the right thing on AMD based vSMP,
    >which also required the cluster check on AMD iirc.

    Andi, Yes. AMD based vSMPowered systems uses clustered APICs, and this
    check base on cpu vendor id is not good :(.


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