Re: Possible Pentium MMX CPU bug?

Adam Spiers (adam@thelonious.new.ox.ac.uk)
Fri, 28 Nov 1997 15:37:52 +0000

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Ingo Molnar (mingo@pc7537.hil.siemens.at) wrote:
> I think i have found the reason why certain applications (Quake, GCC)
> crash on certain Pentium MMX processors. I suspect it is a CPU bug. I have
> a testprogram that detects this bug/condition, and have made a Linux
> kernel patch that is a first attempt to work the bug around.

miles:adam~$ ./mwbug
testing bug ... no Pentium MMX 'missed write' bug in this CPU.
miles:adam~$ cat /proc/cpuinfo
processor : 0
cpu : 586
model : Pentium MMX
vendor_id : GenuineIntel
stepping : 3
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : yes
fpu : yes
fpu_exception : yes
cpuid : yes
wp : yes
flags : fpu vme de pse tsc msr mce cx8 mmx
bogomips : 400.59

It's a 200MHz CPU.

Let me know if I can be of further assistance.

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