Re: mode of the i586 F0 bug
Rogier Wolff (R.E.Wolff@BitWizard.nl)
Fri, 14 Nov 1997 01:16:50 +0100 (MET)
Andrea Arcangeli wrote:
>
> On Wed, 12 Nov 1997, Alan Cox wrote:
>
> >Hopefully that info and the 2.1.63 linux patch is enough to get the fix into
> >other free OS's too. And if anyone can find a way to break the linux 2.1.63
> >fix we'd all love to know. Hopefully a complete official intel workaround
> >will appear shortly and we can switch to that.
>
> _Only_ if I compile the kernel with SMP=1 the fix don' t work: my _one_
> CPU Pentium MMX machine locks. This happen always and _only_ when the
> filesystem is mounted. I _think_ that is caused by syslogd that want to
> write the `printk' to the log. I may be wrong...
>
> Please Linus, apply the patch at the end to 2.1.63 to a better look:
> arca:~$ cat /proc/cpuinfo
> processor : 0
> cpu : 586
> model : Pentium MMX
> vendor_id : GenuineIntel
> stepping : 3
> fdiv_bug : no
> hlt_bug : no
> sep_bug : no
> pentium_f00f_bug : yes
> ^^^^^^^^^^^^^^^^ bleah :).
The fdiv bug also happened only on "pentiums". So why not call it:
f00f_bug : yes
> fpu : yes
> fpu_exception : yes
> cpuid : yes
> wp : yes
> flags : fpu vme de pse tsc msr mce cx8 mmx
> bogomips : 466.94
Roger.
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