Re: [BISECTED] Linux 3.12.7 introduces page map handling regression

[Linus Torvalds]

On Wed, Jan 22, 2014 at 10:07 AM, Rik van Riel <riel@xxxxxxxxxx> wrote:
>
> The difference between a numa pte and a protnone pte is
> the VMA permissions.

If that is indeed the only difference, then we should damn well get
rid of that f*cking stupid _PAGE_NUMA name entirely.

It's misleading crap. Really. Just do a quick grep for that bit, and
you see just *how* confused people are about it:

   #define _PAGE_NUMA _PAGE_PROTNONE
   ...
        if ((pte_flags(a) & (_PAGE_PROTNONE | _PAGE_NUMA)) &

think about it. Just *THINK* about how broken that code is. The whole
thing is a disaster. _PAGE_NUMA must die. It's shit.

                 Linus
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