Re: [PATCH] x86: Construct 32 bit boot time page tables in nativeformat.

From: Jeremy Fitzhardinge
Date: Thu Jan 24 2008 - 18:40:50 EST


H. Peter Anvin wrote:
While we're mucking around in this area, there is another thing which we should eventually get around to fixing:

we need a set of page tables with an identity mapping as well as the kernel mapping, for trampolining (during startup, but also during things like ACPI suspend/resume.) Right now, we let those be the swapper page tables, but that's probably not really a good idea, since it can hide bugs.

So you're suggesting a second system pagetable which has a P=V alias as well as the normal kernel mapping, used only when we actually need that alias? Sounds simple enough to arrange.

J
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