From 90bdcfafdc660b359018262f0f8630d100e28760 Mon Sep 17 00:00:00 2001
From: Konstantin Khlebnikov <khlebnikov@openvz.org>
Date: Tue, 29 May 2012 15:07:02 -0700
Subject: mm/vmscan: push lruvec pointer into should_continue_reclaim()

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Hugh Dickins <hughd@google.com>
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 b139ad7..1d251b5 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1708,14 +1708,13 @@ static bool in_reclaim_compaction(struct scan_control *sc)
  * calls try_to_compact_zone() that it will have enough free pages to succeed.
  * It will give up earlier than that if there is difficulty reclaiming pages.
  */
-static inline bool should_continue_reclaim(struct mem_cgroup_zone *mz,
+static inline bool should_continue_reclaim(struct lruvec *lruvec,
 					unsigned long nr_reclaimed,
 					unsigned long nr_scanned,
 					struct scan_control *sc)
 {
 	unsigned long pages_for_compaction;
 	unsigned long inactive_lru_pages;
-	struct lruvec *lruvec;
 
 	/* If not in reclaim/compaction mode, stop */
 	if (!in_reclaim_compaction(sc))
@@ -1748,7 +1747,6 @@ static inline bool should_continue_reclaim(struct mem_cgroup_zone *mz,
 	 * If we have not reclaimed enough pages for compaction and the
 	 * inactive lists are large enough, continue reclaiming
 	 */
-	lruvec = mem_cgroup_zone_lruvec(mz->zone, mz->mem_cgroup);
 	pages_for_compaction = (2UL << sc->order);
 	inactive_lru_pages = get_lruvec_size(lruvec, LRU_INACTIVE_FILE);
 	if (nr_swap_pages > 0)
@@ -1759,7 +1757,7 @@ static inline bool should_continue_reclaim(struct mem_cgroup_zone *mz,
 		return true;
 
 	/* If compaction would go ahead or the allocation would succeed, stop */
-	switch (compaction_suitable(mz->zone, sc->order)) {
+	switch (compaction_suitable(lruvec_zone(lruvec), sc->order)) {
 	case COMPACT_PARTIAL:
 	case COMPACT_CONTINUE:
 		return false;
@@ -1826,7 +1824,7 @@ restart:
 				   sc, LRU_ACTIVE_ANON);
 
 	/* reclaim/compaction might need reclaim to continue */
-	if (should_continue_reclaim(mz, nr_reclaimed,
+	if (should_continue_reclaim(lruvec, nr_reclaimed,
 				    sc->nr_scanned - nr_scanned, sc))
 		goto restart;
 
-- 
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