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 <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 17a7134..0e081ca 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -142,7 +142,7 @@
 
 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 @@
 			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;
 			}