On Mon, May 30, 2011 at 03:13:43AM +0900, Minchan Kim wrote: > There are some places to isolate lru page and I believe > users of isolate_lru_page will be growing. > The purpose of them is each different so part of isolated pages > should put back to LRU, again. > > The problem is when we put back the page into LRU, > we lose LRU ordering and the page is inserted at head of LRU list. > It makes unnecessary LRU churning so that vm can evict working set pages > rather than idle pages. > > This patch adds new modes when we isolate page in LRU so we don't isolate pages > if we can't handle it. It could reduce LRU churning. > > This patch doesn't change old behavior. It's just used by next patches. > > Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> > Cc: Mel Gorman <mgorman@xxxxxxx> > Cc: Rik van Riel <riel@xxxxxxxxxx> > Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx> > Cc: Johannes Weiner <hannes@xxxxxxxxxxx> > Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> > Signed-off-by: Minchan Kim <minchan.kim@xxxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx 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>