On Tue 19-07-16 22:22:16, zhongjiang wrote:
> From: zhong jiang <zhongjiang@xxxxxxxxxx>
>
> when pfn_valid(pfn) return false, pfn should be align with
> pageblock_nr_pages other than MAX_ORDER_NR_PAGES in
> init_pages_in_zone, because the skipped 2M may be valid pfn,
> as a result, early allocated count will not be accurate.
I really do not understand this changelog. I thought that
MAX_ORDER_NR_PAGES and pageblock_nr_pages are the same thing but they
might not be for HUGETLB. Should init_pages_in_zone depend on something
like HUGETLB? Is this even correct I would have expected that we should
initialize in the page block steps so MAX_ORDER_NR_PAGES. Could you
clarify Joonsoo, please?
>
> Signed-off-by: zhong jiang <zhongjiang@xxxxxxxxxx>
> ---
> mm/page_owner.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/page_owner.c b/mm/page_owner.c
> index c6cda3e..aa2c486 100644
> --- a/mm/page_owner.c
> +++ b/mm/page_owner.c
> @@ -310,7 +310,7 @@ static void init_pages_in_zone(pg_data_t *pgdat, struct zone *zone)
> */
> for (; pfn < end_pfn; ) {
> if (!pfn_valid(pfn)) {
> - pfn = ALIGN(pfn + 1, MAX_ORDER_NR_PAGES);
> + pfn = ALIGN(pfn + 1, pageblock_nr_pages);
> continue;
> }
>
> --
> 1.8.3.1
--
Michal Hocko
SUSE Labs
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