Re: 4level page tables for Linux II

[Andi Kleen]

On 12 Oct 2004 23:36:40 -0400
Albert Cahalan <albert@xxxxxxxxxxxx> wrote:

> Hmmm...
> 
> pml4, pgd, pmd, pte  (kernel names)
> PML4E, PDPE, PDE, PTE   (AMD hardware names)

No actually a PML4E is a PML4 _E_ntry in the AMD/Intel docs.
PML4 is the official name for the fourth level page.

> It's kind of a mess, isn't it? It was bad enough
> with the "pmd" (page middle directory, ugh) being
> some random invention and everything being generally
> in conflict with real hardware naming. Now you've
> come up with a fourth name.
> 
> Notice that you've resorted to using a number.

I just followed AMD.

> Why not do that for the others too? It would
> bring some order to this ever-growing collection
> of arbitrary names. Like this:

I don't think it makes sense to break code unnecessarily.

And when you cannot remember the few names for the level you 
better shouldn't touch VM at all.

-Andi
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