From d149e3b25d7c5f33de9aa866303926fa53535aa7 Mon Sep 17 00:00:00 2001 From: Ying Han Date: Thu, 26 May 2011 16:25:27 -0700 Subject: memcg: add the soft_limit reclaim in global direct reclaim. We recently added the change in global background reclaim which counts the return value of soft_limit reclaim. Now this patch adds the similar logic on global direct reclaim. We should skip scanning global LRU on shrink_zone if soft_limit reclaim does enough work. This is the first step where we start with counting the nr_scanned and nr_reclaimed from soft_limit reclaim into global scan_control. Signed-off-by: Ying Han Cc: KOSAKI Motohiro Cc: Minchan Kim Cc: Daisuke Nishimura Cc: Balbir Singh Cc: KAMEZAWA Hiroyuki Cc: Mel Gorman Cc: Johannes Weiner Cc: Rik van Riel Cc: Hugh Dickins Cc: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/vmscan.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 9ce6ec84328e..884ae08c16cc 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1977,11 +1977,14 @@ restart: * If a zone is deemed to be full of pinned pages then just give it a light * scan then give up on it. */ -static void shrink_zones(int priority, struct zonelist *zonelist, +static unsigned long shrink_zones(int priority, struct zonelist *zonelist, struct scan_control *sc) { struct zoneref *z; struct zone *zone; + unsigned long nr_soft_reclaimed; + unsigned long nr_soft_scanned; + unsigned long total_scanned = 0; for_each_zone_zonelist_nodemask(zone, z, zonelist, gfp_zone(sc->gfp_mask), sc->nodemask) { @@ -1998,8 +2001,17 @@ static void shrink_zones(int priority, struct zonelist *zonelist, continue; /* Let kswapd poll it */ } + nr_soft_scanned = 0; + nr_soft_reclaimed = mem_cgroup_soft_limit_reclaim(zone, + sc->order, sc->gfp_mask, + &nr_soft_scanned); + sc->nr_reclaimed += nr_soft_reclaimed; + total_scanned += nr_soft_scanned; + shrink_zone(priority, zone, sc); } + + return total_scanned; } static bool zone_reclaimable(struct zone *zone) @@ -2064,7 +2076,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist, sc->nr_scanned = 0; if (!priority) disable_swap_token(); - shrink_zones(priority, zonelist, sc); + total_scanned += shrink_zones(priority, zonelist, sc); /* * Don't shrink slabs when reclaiming memory from * over limit cgroups -- cgit v1.2.3