On Wed, Aug 08, 2012 at 10:48:24AM +0900, Minchan Kim wrote: > Hi Mel, > > Just out of curiosity. > What's the problem did you see? (ie, What's the problem do this patch solve?) Everythign in this series is related to the problem in the leader - high order allocation success rates are lower. This patch increases the success rates when allocating under load. > AFAIUC, it seem to solve consecutive allocation success ratio through > getting several free pageblocks all at once in a process/kswapd > reclaim context. Right? Only pageblocks if it is order-9 on x86, it reclaims an amount that depends on an allocation size. This only happens during reclaim/compaction context when we know that a high-order allocation has recently failed. The objective is to reclaim enough order-0 pages so that compaction can succeed again. -- Mel Gorman SUSE Labs -- 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>