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    SubjectRe: [patch 02/11] PAT x86: Map only usable memory in x86_64 identity map and kernel text

    On Thu, 10 Jan 2008, wrote:
    > x86_64: Map only usable memory in identity map. All reserved memory maps to a
    > zero page.

    I don't mind this horribly per se, but why a zero page?

    Accessing that page without mapping it explicitly would be a bug with
    your change - if only because you'd get the wrong value!

    So why map it at all? The only thing mapping it can do is to hide bugs.


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      Last update: 2008-01-10 22:13    [W:0.020 / U:8.232 seconds]
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