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SubjectRe: 2.4 MM overview?
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> I understand that 2.4 no longer maps all physical memory as 2.2
> and earlier used to do.

Its really up to you if you choose to do that or not. If you have enough
address space to create all your virtual and physical mappings without problems,
or you have a sane memory management model with tags/spaces then its a non issue

> Is there any documentation on this change and how it affects
> arch-specific code?

If you map everything you define a kmap and kunmap that are like the x86 small
memory (<1Gig) setup, and they dont do anything.

Alan

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