On Tue, Jun 12, 2012 at 07:49:34AM +0900, Minchan Kim wrote: > If THP page isn't LRU and it's still PageTransHuge, I think it's rather rare and > although it happens, it means migration/reclaimer is about to split or isolate/putback > so it ends up making THP page movable pages. > > IMHO, it would be better to account it by movable pages. > What do you think about it? Agreed. Besides THP don't fragment pageblocks. It was just about speeding up the scanning the same way it happens with the pagebuddy check, but probably not worth it because we're in a racy area here not holding locks. pagebuddy is safe because the zone lock is hold, or it'd run in the same problem. -- 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>