Gerd Hoffmann wrote:
> Didn't try (yet), but I don't think so. It's not the pgd which is
> broken, but the pmd. And I think this way:
>
> (1) pmd is created
> (2) pmd is taken out of the slabcache and used for the kernel/xen
> address space (i.e. slot-3 in the PAE pgd).
> (3) xen fills in the page table entries for the hypervisor hole
> (4) pmd released and put back into the slab cache.
> (5) pmd gets reused, but for userspace addresses this time (pgd
> slot 0-2).
> (6) xen_pin() finds the stale entries for the hypervisor hole
> ==> Oops.
Ah, right.
J
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