On 1.4.2016 4:06, js1...@gmail.com wrote: > From: Joonsoo Kim <iamjoonsoo....@lge.com> > > There is a system that node's pfn are overlapped like as following. > > -----pfn--------> > N0 N1 N2 N0 N1 N2 > > Therefore, we need to care this overlapping when iterating pfn range. > > There are one place in page_owner.c that iterates pfn range and > it doesn't consider this overlapping. Add it. > > Without this patch, above system could over count early allocated > page number before page_owner is activated. > > Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com>
Acked-by: Vlastimil Babka <vba...@suse.cz> > --- > mm/page_owner.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/mm/page_owner.c b/mm/page_owner.c > index ac3d8d1..438768c 100644 > --- a/mm/page_owner.c > +++ b/mm/page_owner.c > @@ -301,6 +301,9 @@ static void init_pages_in_zone(pg_data_t *pgdat, struct > zone *zone) > > page = pfn_to_page(pfn); > > + if (page_zone(page) != zone) > + continue; > + > /* > * We are safe to check buddy flag and order, because > * this is init stage and only single thread runs. >
