On Tue, Jul 27, 2010 at 11:34 PM, Christoph Lameter
<cl@xxxxxxxxxxxxxxxxxxxx> wrote:
> On Tue, 27 Jul 2010, Minchan Kim wrote:
>
>> But in fact I have a concern to use PG_reserved since it can be used
>> afterward pfn_valid normally to check hole in non-hole system. So I
>> think it's redundant.
Ignore me. I got confused.
>
> PG_reserved is already used to mark pages not handled by the page
> allocator (see mmap_init_zone).
I will resend below approach.
static inline int memmap_valid(unsigned long pfn)
{
struct page *page = pfn_to_page(pfn);
struct page *__pg = virt_to_page(page);
return page_private(__pg) == MAGIC_MEMMAP && PageReserved(__pg);
}
Thanks, all.
--
Kind regards,
Minchan Kim
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxxx For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>