On 10/23/2014 10:10 AM, Joonsoo Kim wrote: > Changes from v3: > Add one more check in free_one_page() that checks whether migratetype is > MIGRATE_ISOLATE or not. Without this, abovementioned case 1 could happens. Good catch. > Cc: <stable@xxxxxxxxxxxxxxx> > Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> (minor suggestion below) > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -749,9 +749,16 @@ static void free_one_page(struct zone *zone, > if (nr_scanned) > __mod_zone_page_state(zone, NR_PAGES_SCANNED, -nr_scanned); > > + if (unlikely(has_isolate_pageblock(zone) || Would it make any difference if this was read just once and not in each loop iteration? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>