On Wed, Oct 14, 2015 at 02:28:31PM +0200, Vlastimil Babka wrote: > On 08/24/2015 04:19 AM, Joonsoo Kim wrote: > > Now, compaction algorithm become powerful. Migration scanner traverses > > whole zone range. So, old threshold for depleted zone which is designed > > to imitate compaction deferring approach isn't appropriate for current > > compaction algorithm. If we adhere to current threshold, 1, we can't > > avoid excessive overhead caused by compaction, because one compaction > > for low order allocation would be easily successful in any situation. > > > > This patch re-implements threshold calculation based on zone size and > > allocation requested order. We judge whther compaction possibility is > > depleted or not by number of successful compaction. Roughly, 1/100 > > of future scanned area should be allocated for high order page during > > one comaction iteration in order to determine whether zone's compaction > > possiblity is depleted or not. > > Finally finishing my review, sorry it took that long... > Ah... I forgot to mention that I really appreciate your help. Thanks for review!! Thanks! -- 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>