Messages in this thread | | | Date | Mon, 14 Jan 2008 17:56:35 +0100 | From | Ingo Molnar <> | Subject | Re: unify pagetable accessors patch causes double fault II |
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* Jeremy Fitzhardinge <jeremy@goop.org> wrote:
>> This is with PAE and seems to only happen with enough RAM (6GB); a >> 2GB system boots. 64bit also works. > > Thanks, I'll have a close look at it. Presumably a pfn is getting > truncated to 20/32-bits somewhere.
would be nice to have some debugging apparatus for bugs like this. Perhaps artificially add a large pfn, then convert/unconvert, then subtract it and expect the whole transformation to be an identity mapping? This way we could simulate most of the effects of >4GB RAM, right?
Ingo
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