Re: [Xen-devel] Breakage in -unstable for Transmeta

["Carl Holtje ;021;vcsg6;" <cwh0803@xxxxxxxxxx>]

On Fri, 24 Jun 2005, Keir Fraser wrote:

>
> On 24 Jun 2005, at 14:30, Carl Holtje ;021;vcsg6; wrote:
>
> >> Maybe the pagetable layout has changed. That write to CR0 enables
> >> paging so if the tables are not in a format that Transmeta likes then
> >> you would probably fail at that point. But I don't think the initial
> >> layout differs from 2.0.6...
> >
> > I apologize for being so dense, but how do I go about investigating
> > this further?
>
> No apology needed -- I really cannot see where a bug has been
> introduced, but assuming your debug code works on one code version
> (2.0.6) and not the other (latest unstable), clearly a bug does exist.
>
> The only good point of the situation is that there isn't actually that
> much code in x86_32.S to be going wrong. It's feasible to check through
> it line by line and compare with 2.0.6 as you go. How about you try
> reducing the number of flags you set in %cr0, or double check that the
> code that creates the initial pagetables really is identical between
> 2.0.6 and unstable?

Is the initial page table creation code in xen/include/asm/page.h?

Thanks!

Carl

- --

"There are 10 types of people in the world: Those who understand binary
and those that don't."

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