USB mass storage and ARM cache coherency

[Benjamin Herrenschmidt]

On Wed, 2010-03-10 at 12:52 +0900, Paul Mundt wrote:
> Well, it does start to get a bit painful with sparsemem section or
> NUMA
> node IDs also digging in to the page flags on 32-bit.. the benefits
> would
> have to be pretty compelling to offset the pain. 

Unless we play a dangerous trick and re-use another flag that isn't
meaningful for allocated pages... maybe PG_buddy ? Or do I miss
something about that guy semantics ?

Cheers,
Ben.