[Nouveau] conflicting memory types

[Xavier]

On Fri, Dec 11, 2009 at 7:12 PM, Xavier <shiningxc at gmail.com> wrote:
> I just noticed these messages in my logs :
> modprobe:1998 conflicting memory types e8000000-e8010000
> uncached-minus<->write-combining
> reserve_memtype failed 0xe8000000-0xe8010000, track uncached-minus,
> req uncached-minus
> ioremap reserve_memtype failed -16
> Xorg:5078 conflicting memory types e8000000-e8010000
> uncached-minus<->write-combining
> reserve_memtype failed 0xe8000000-0xe8010000, track uncached-minus,
> req uncached-minus
>
> I have this on two different box, one with nv25 and one with nv35.
>
> I followed several links on google, and had a look at
> arch/x86/mm/pat.c but I still don't understand well what it means,
> whose fault it is, and what could the consequences be.
> About the possible consequences, that code comment sounds a bit scary,
> even though everything seems to be working.
>
>  * The global memtype list keeps track of memory type for specific
>  * physical memory areas. Conflicting memory types in different
>  * mappings can cause CPU cache corruption. To avoid this we keep track.
>

Just for the record, curro fixed the modprobe one with this patch :
http://annarchy.freedesktop.org/~currojerez/vga_font_memory_types.patch

And about the xorg one :
14:26 < curro_> shining: the x server error is nouveau's fault, most
of the stuff in nv_setup.c deserves killing