Re: [Xen-devel] XENFEAT_writable_pagetables vs VMASST_TYPE_writable_pagetables

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 31 May 2006, at 16:09, Jacob Gorm Hansen wrote:

> This works everywhere, except the call at the bottom of pgd_walk()
> when called from __pgd_unpin(). If the pgd is not writable after
> unpin, weird stuff starts to happen --- the next call to pmd_clear()
> from free_pte_range() fails in Xen, citing incorrect page types.
>
> Can you tell me why linux/xen/the wrpt implementation cannot handle
> the unpinned pgd being mapped read-only like this?
I'll need to see a backtrace, or at least the particular error message 
from Xen.
 -- Keir


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