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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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