On 2016/8/16 16:41, Michal Hocko wrote: > On Thu 04-08-16 19:25:03, Xishi Qiu wrote: >> MAX_ORDER_NR_PAGES is usually 4M, and a pageblock is usually 2M, so we only >> set one pageblock's migratetype in deferred_free_range() if pfn is aligned >> to MAX_ORDER_NR_PAGES. > > Do I read the changelog correctly and the bug causes leaking unmovable > allocations into movable zones? Hi Michal, This bug will cause uninitialized migratetype, you can see from "cat /proc/pagetypeinfo", almost half blocks are Unmovable. Also this bug missed to free the last block pages, it cause memory leaking. Thanks, Xishi Qiu -- 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>