On Wed, Feb 01, 2012 at 03:10:21AM +0000, bill4carson wrote:

Why L_PTE_HUGEPAGE is needed?

hugetlb subsystem will call pte_page to derive the corresponding page 
struct from a given pte, and pte_pfn is used first to convert pte into
a page frame number.

Are you sure the pte_pfn() conversion is right? Does it need to be
different from the 4K pfn? I haven't seen any other architecture doing
shifts other than PAGE_SHIFT even for huge pages.

-- 
Catalin