Re: [Xen-devel] XENFEAT_writable_pagetables vs VMASST_TYPE_writable_pagetables

["Jacob Gorm Hansen" <jacobg@xxxxxxx>]

On 5/31/06, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:

> This doesn't look like the result of a pmd_clear() call. Looks like a
> L2 (pgd) is being allocated -- perhaps due to pinning or changing %cr3.
> It's failing because one of the L1 pages it references is writable by
> the guest (ie. the guest has a writable mapping of that L1 page
> somewhere).
Hmm it _does_ happen on pmd_clear (which is a macro that turns into a
xen mmu update call). The funny thing is how giving val=0 can end up
as an alloc_l2_page.

Jacob

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