Re: + uml-fix-pte-bit-collision.patch added to -mm tree

Re: + uml-fix-pte-bit-collision.patch added to -mm tree

[Blaisorblade]

On martedì 27 marzo 2007, akpm@linux-foundation.org wrote:
> The patch titled
>      uml: fix pte bit collision
> has been added to the -mm tree.  Its filename is
>      uml-fix-pte-bit-collision.patch

ACK from me:

Acked-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>

> *** Remember to use Documentation/SubmitChecklist when testing your code
> ***
>
> See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
> out what to do about this

> ------------------------------------------------------
> Subject: uml: fix pte bit collision
> From: Miklos Szeredi <mszeredi@suse.cz>
>
> _PAGE_PROTNONE conflicts with the lowest bit of pgoff.  This causes all
> sorts of weirdness when nonlinear mappings are used.

Hmm, I had unit-tested to death the code with a custom test-program...
The interesting thing is that I only tested my remap_file_pages changes (which 
are unaffected by this), not the existing code...
-- 
Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade