On Fri 11-01-13 11:17:45, Michal Hocko wrote:
[...]
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index be2b90c..59eddff 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -128,6 +128,64 @@ void __ref put_page_bootmem(struct page *page)
>
> }
>
> +void register_page_bootmem_memmap(unsigned long section_nr,
> + struct page *start_page, unsigned long size)
> +{
> + unsigned long addr = (unsigned long)start_page;
> + unsigned long end = (unsigned long)(start_page + size);
> + unsigned long next;
> + pgd_t *pgd;
> + pud_t *pud;
> + pmd_t *pmd;
> + unsigned int nr_pages;
> + struct page *page;
> +
> + for (; addr < end; addr = next) {
> + pte_t *pte = NULL;
> +
> + pgd = pgd_offset_k(addr);
> + if (pgd_none(*pgd)) {
> + next = (addr + PAGE_SIZE) & PAGE_MASK;
> + continue;
> + }
> + get_page_bootmem(section_nr, pgd_page(*pgd), MIX_SECTION_INFO);
> +
> + pud = pud_offset(pgd, addr);
> + if (pud_none(*pud)) {
> + next = (addr + PAGE_SIZE) & PAGE_MASK;
> + continue;
> + }
> + get_page_bootmem(section_nr, pud_page(*pud), MIX_SECTION_INFO);
> +
> + if (!cpu_has_pse) {
Darn! And now that I am looking at the patch closer it is too x86
centric so this cannot be in the generic code. I will try to cook
something better. Sorry about the noise.
[...]
--
Michal Hocko
SUSE Labs
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