From b1aff7fcf86c88472b0a70f15d89d7a4adba07bb Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Tue, 24 Sep 2013 15:27:38 -0700 Subject: revert "vmscan, memcg: do softlimit reclaim also for targeted reclaim" Revert commit a5b7c87f9207 ("vmscan, memcg: do softlimit reclaim also for targeted reclaim") I merged this prematurely - Michal and Johannes still disagree about the overall design direction and the future remains unclear. Cc: Michal Hocko Cc: Johannes Weiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memcontrol.c | 14 +++++--------- mm/vmscan.c | 4 ++-- 2 files changed, 7 insertions(+), 11 deletions(-) (limited to 'mm') diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 65e7bec4b0f..47cdc7eb1a6 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1760,13 +1760,11 @@ int mem_cgroup_select_victim_node(struct mem_cgroup *memcg) #endif /* - * A group is eligible for the soft limit reclaim under the given root - * hierarchy if - * a) it is over its soft limit + * A group is eligible for the soft limit reclaim if + * a) it is over its soft limit * b) any parent up the hierarchy is over its soft limit */ -bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg, - struct mem_cgroup *root) +bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg) { struct mem_cgroup *parent = memcg; @@ -1774,14 +1772,12 @@ bool mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg, return true; /* - * If any parent up to the root in the hierarchy is over its soft limit - * then we have to obey and reclaim from this group as well. + * If any parent up the hierarchy is over its soft limit then we + * have to obey and reclaim from this group as well. */ while ((parent = parent_mem_cgroup(parent))) { if (res_counter_soft_limit_excess(&parent->res)) return true; - if (parent == root) - break; } return false; diff --git a/mm/vmscan.c b/mm/vmscan.c index 17a7134de4d..0e081cada4b 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -142,7 +142,7 @@ static bool global_reclaim(struct scan_control *sc) static bool mem_cgroup_should_soft_reclaim(struct scan_control *sc) { - return !mem_cgroup_disabled(); + return !mem_cgroup_disabled() && global_reclaim(sc); } #else static bool global_reclaim(struct scan_control *sc) @@ -2195,7 +2195,7 @@ __shrink_zone(struct zone *zone, struct scan_control *sc, bool soft_reclaim) struct lruvec *lruvec; if (soft_reclaim && - !mem_cgroup_soft_reclaim_eligible(memcg, root)) { + !mem_cgroup_soft_reclaim_eligible(memcg)) { memcg = mem_cgroup_iter(root, memcg, &reclaim); continue; } -- cgit v1.2.3-70-g09d2