Re: 2.4.19-pre2 Cyrix III SEGFAULT (Cyrix II redux?)

Dave Jones (davej@suse.de)
Sat, 16 Mar 2002 20:42:28 +0100

On Sat, Mar 16, 2002 at 10:07:05AM -0800, S W wrote:
> But I recalled Linux 2.2 having a bug fix for broken
> L2 cache in Cyrix II.

The cache itself isn't broken. Reporting of the size of it is.

> So, it got me thinking again...
> (did Cyrix fix this L2 cache in certain subsequential
> core?)

The bug is potentially in all cores with cpuid 670->68F
If you have it, and you're not running a kernel with the
fix you'll see you have a 16MB cache. If you run a kernel
with the fix, you'll have the correct size (64KB)

> Does anyone recall where exactly are the Cyrix II L2
> cache bug fix in the kernelso that I can experiement
> them toward the Cyrix III?

arch/i386/kernel/setup.c display_cacheinfo()

-- 
| Dave Jones.        http://www.codemonkey.org.uk
| SuSE Labs
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