dmesg says CPU has Pentium F0 0F bug..../proc/cpuinfo says it hasnt

Ralf Corsepius rc040203 at freenet.de
Fri Jun 30 02:29:36 UTC 2006


On Fri, 2006-06-30 at 03:15 +0100, 0 wrote:
> Hi,
> 
> dmesg indicates my CPU has the Pentium F0 0F bug...

> But looking at /proc/cpuinfo indicates the opposite:
> 
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 5
> model           : 4
> model name      : Pentium MMX
> stepping        : 3
> cpu MHz         : 232.300
> fdiv_bug        : no
> hlt_bug         : no
> *f00f_bug        : no*
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 1
> wp              : yes
> flags           : fpu vme de pse tsc msr mce cx8 mmx
> bogomips        : 465.42
> 
> Think there may be a bug in cpuinfo, because I'm sure I remember it used 
> to say yes for the f00f_bug.
> 
> Any thoughts?
Interesting - Your remark caused me to check my ca. 10 years old i586,
who had been reported to suffer from the f00f bug since it exists,
and ... I am observing the same.

I'd say file a bug into bugzilla.

Ralf





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