2000-11-03 20:58:49

by Pavel Machek

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Subject: celeron-class misdetected as 486

Hi!

In 2.4.0-test10, I get

pavel@bug:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 4
model : 0
model name : 486 DX-25/33
stepping : 0
cache size : 128 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : no
cpuid level : 3
wp : yes
use_tsc : no


.... that's wrong. Older kernels detect it correctly as:

May 10 21:39:04 bug kernel: Pentium-III serial number disabled.
May 10 21:39:04 bug kernel: CPU: Intel Celeron (Mendocino) stepping 0a

Pavel
--
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Panos Katsaloulis describing me w.r.t. patents at [email protected]


2000-11-03 21:12:24

by Dave Jones

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Subject: Re: celeron-class misdetected as 486


Pavel Machek wrote..

> pavel@bug:~$ cat /proc/cpuinfo
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 4
^^^
Since when were there family 4 Celerons ?

> model : 0
> model name : 486 DX-25/33
> stepping : 0
> cache size : 128 KB

Though a 486 with 128K cache is also unlikely.
(Although some of the wierd overdrives had such added fun iirc)

>.... that's wrong. Older kernels detect it correctly as:
>May 10 21:39:04 bug kernel: Pentium-III serial number disabled.
>May 10 21:39:04 bug kernel: CPU: Intel Celeron (Mendocino) stepping 0a

Which older kernel detected this ?

This is really bizarre, as there are cpuid capable 486s with the
family/vendor IDs reported above. I do hope we don't have to add
more cachesize checking. That part of setup.c is ugly enough
already.

Can you open up and find out if it really is a Celeron in that box
before such code gets added ?

regards,

Dave.

--
| Dave Jones <[email protected]> http://www.suse.de/~davej
| SuSE Labs