Re: [PATCH]Fix broken VMI in 2.6.27-rc..

[H. Peter Anvin]

Zachary Amsden wrote:
> > Realistically speaking, any (virtual) machine which does *not* have a
> > full complement of lowmem (i.e. less than 896 MB in the common case)
> > will not suffer significatly from losing a few megabytes of address space.
>
> Yes, the reason to make the fixmap moveable is to allow as much address
> space as possible for big memory (physical) machines.

That being said, the fixmap area being movable more than kind of defeats 
a major point of the fixmap area; the addresses in it are no longer fixed.

The only way I can see around that, though, is to move the 1:1 mapping 
base up by 2/4 MB (for PAE/no PAE, respectively) and put the fixmap area 
there.  Kind of sucks, but would be doable.

	-hpa
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