On Thu, Apr 28, 2011 at 08:20:32AM +0900, Minchan Kim wrote: > On Wed, Apr 27, 2011 at 5:11 PM, KAMEZAWA Hiroyuki > <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote: > > On Wed, 27 Apr 2011 01:25:21 +0900 > > Minchan Kim <minchan.kim@xxxxxxxxx> wrote: > > > >> Commonly, putback_lru_page is used with isolated_lru_page. > >> The isolated_lru_page picks the page in middle of LRU and > >> putback_lru_page insert the lru in head of LRU. > >> It means it could make LRU churning so we have to be very careful. > >> Let's clear description of putback_lru_page. > >> > >> Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> > >> Cc: Mel Gorman <mgorman@xxxxxxx> > >> Cc: Rik van Riel <riel@xxxxxxxxxx> > >> Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx> > >> Signed-off-by: Minchan Kim <minchan.kim@xxxxxxxxx> > > > > seems good... > > Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> > > > > But is there consensus which side of LRU is tail? head? > > I don't know. I used to think it's head. > If other guys raise a concern as well, let's talk about it. :) > Thanks I suppose we add new pages to the head of the LRU and reclaim old pages from the tail. 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>