Re: CPU/cache detection wrong

Dave Jones
2002-10-01T15:07:15Z

On Tue, Oct 01, 2002 at 03:35:54PM +0200, Maciej W. Rozycki wrote:

> > Some of the tualatins have an errata which makes L2 cache sizing
> > impossible. They actually report they have 0K L2 cache. By checking
> > the CPU model, we can guess we have at least 256K (which is where Linux
> > got that number from in your case). But this however means the 512K
> > models will report as 256K too.
> > To work around it, boot with cachesize=512 and all will be good.
>
> Strange -- why not to default to 256K and override it with the value
> obtained from a cache descriptor if != 0, then?

Because the cache descriptor IS zero. So we default to 256K.

Dave

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| Dave Jones. http://www.codemonkey.org.uk