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    SubjectRe: HT not active
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    On Mon, 2006-08-14 at 13:38 +0200, Jan Engelhardt wrote:
    > Hello list,
    >
    >
    >
    > I cannot get HT to be used on some machine:
    >
    > w04a# cat /proc/cpuinfo
    > processor : 0
    > vendor_id : GenuineIntel
    > cpu family : 15
    > model : 0
    > model name : Intel(R) Pentium(R) 4 CPU 1700MHz
    > stepping : 10
    > cpu MHz : 1694.890
    > cache size : 256 KB
    > fdiv_bug : no
    > hlt_bug : no
    > f00f_bug : no
    > coma_bug : no
    > fpu : yes
    > fpu_exception : yes
    > cpuid level : 2
    > wp : yes
    > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
    > cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm up
    > bogomips : 3393.46
    >
    > 'ht' indicates:
    > #define X86_FEATURE_HT (0*32+28) /* Hyper-Threading */


    the "ht" flag does not mean what you think it means.....
    it does NOT mean "I can use hyperthreading on this machine"; it
    basically means "the ht cpuid commands work", so that linux can find the
    nr of siblings, which can be..... 1

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