82xx performance

[Rune Torgersen]

Arnd Bergmann wrote:
> Seeing more hits in handle_mm_fault suggests that you have
> a higher page fault rate. A trivial reason for this might
> be that the amount of memory was misdetected in the new
> code (maybe broken device tree). What is the content of
> /proc/meminfo after a fresh boot?

I also just realized that the /aprch/ppc was set up without high-mem
support (using all 1G as lowmem), while the arch/powerpc was set up with
hightmem. I'm retrying a compile without highmem support and 1 G lowmem
on arch/powerpc now to see if it makes a difference.