On Thu, Jun 30, 2011 at 1:50 PM, Becky Bruce [off-list ref] w=
rote:

Because there was no bootmem allocation in the normal case - the non-high=

mem

version stores data structure in the huge page itself. =A0This is perfect=

ly fine as long

as you have a mapping. =A0Since this isn't true for HIGHMEM pages, I allo=

cate

bootmem to store the early data structure that stores information about t=

he

hugepage (this happens in arch-specific code in alloc_bootmem_huge_page).

I would put this text in a comment in the code.

--=20
Timur Tabi
Linux kernel developer at Freescale=