Re: [Xen-devel] Reproducible system crash

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 17 Mar 2005, at 12:33, Peter Joanes wrote:

> On Wednesday 16 March 2005 18:55, Keir wrote:
> > ... Here's a slightly harder thing to try:
> >
> > 1. Edit linux/include/asm-xen/asm-i386/pgtable-2level.h, and change
> > set_pte_batched() to use xen_l1_pgentry_update rather than
> > queue_l1_pgentry_update. Also, kill current definition of set_pte() 
> > and
> > redefine it to the same as the new set_pte_batched().
> s/pgentry/entry/ in the above? -- That's what I've used
Yes.

> > 2. Edit xen/arch/x86/memory.c, at the test that fails for you ('Bad L1
> > type'). In the error path, before returning 0, add:
> >      extern void show_guest_stack(void);
> >      show_guest_stack();
> I left out the definition, it was somewhere else.
Okay.

The kernel is still using writable pagetables however (you can tell 
because of the 'could not re-validate L1 page' error message). Perhaps 
you ran the wrong kernel, or didn't redefine set_pte() correctly in the 
right place?
 -- Keir



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