Re: __supported_pte_mask breaks PROT_NONE pages

From: Ingo Molnar
Date: Thu Feb 05 2009 - 09:30:17 EST



* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:

> On an x86 system which doesn't support global mappings,
> __supported_pte_mask has _PAGE_GLOBAL clear, to make sure it never
> appears in the PTE. pfn_pte() and so on will enforce it with:

btw., did you actually see a boot crash due to this, on a pre-PGE system?

Ingo
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