On Thu, 29 Dec 2011, KOSAKI Motohiro wrote: > > When lumpy reclaim occur, isolate_lru_pages() gather much pages than > SWAP_CLUSTER_MAX. Oh, good point, I hadn't thought of that. > However, at that time, I think this patch behave > better than old. If we release and retake zone lock per 14 pages, > other tasks can easily steal a part of lumpy reclaimed pages. and then > long latency wrongness will be happen when system is under large page > memory allocation pressure. That's the reason why I posted very similar patch > a long time ago. Aha, and another good point. Thank you. Hugh -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>