Re: [PATCH] Documenation/vm/numa

[Eric W. Biederman]

"Martin J. Bligh" <[e-mail]> writes:
> 
> Note that there are two possible ways to define a pfn, in my mind.
> One would be page_phys_addr >> PAGE_SHIFT. The other would be the
> offset of the struct page for that page within the mythical mem_map
> array. I prefer the former, though it probably contradicts everyone
> else ;-) It's useful to have some way to pass around a 36 bit address
> inside a 32 bit field.

A page frame number (pfn) is definitely the former 
(page_phys_addr >> PAGE_SHIFT).

Eric