On Tue, Mar 19, 2013 at 06:26:43PM +0800, Simon Jeons wrote: > >>>- if (sc.nr_reclaimed >= SWAP_CLUSTER_MAX) > >>>- break; > >>>- } while (--sc.priority >= 0); > >>>+ if (order && sc.nr_reclaimed >= 2UL << order) > >>>+ order = sc.order = 0; > >>If order == 0 is meet, should we do defrag for it? > >> > >Compaction is unnecessary for order-0. > > > > I mean since order && sc.reclaimed >= 2UL << order, it is reclaimed > for high order allocation, if order == 0 is meet, should we do > defrag for it? > I don't get this question at all. We do not defrag via compaction for order-0 allocation requests because it makes no sense. -- 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>