1 files changed, 0 insertions, 57 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index b7a4e6a3cf89..594eba8a44c0 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1290,20 +1290,6 @@ done:
 }
 
 /*
- * We are about to scan this zone at a certain priority level.  If that priority
- * level is smaller (ie: more urgent) than the previous priority, then note
- * that priority level within the zone.  This is done so that when the next
- * process comes in to scan this zone, it will immediately start out at this
- * priority level rather than having to build up its own scanning priority.
- * Here, this priority affects only the reclaim-mapped threshold.
- */
-static inline void note_zone_scanning_priority(struct zone *zone, int priority)
-{
-        if (priority < zone->prev_priority)
-                zone->prev_priority = priority;
-}
-
-/*
  * This moves pages from the active list to the inactive list.
  *
  * We move them the other way if the page is referenced by one or more
@@ -1766,17 +1752,8 @@ static bool shrink_zones(int priority, struct zonelist *zonelist,
                 if (scanning_global_lru(sc)) {
                         if (!cpuset_zone_allowed_hardwall(zone, GFP_KERNEL))
                                 continue;
-                        note_zone_scanning_priority(zone, priority);
-
                         if (zone->all_unreclaimable && priority != DEF_PRIORITY)
                                 continue;       /* Let kswapd poll it */
-                } else {
-                        /*
-                         * Ignore cpuset limitation here. We just want to reduce
-                         * # of used pages by us regardless of memory shortage.
-                         */
-                        mem_cgroup_note_reclaim_priority(sc->mem_cgroup,
-                                                        priority);
                 }
 
                 shrink_zone(priority, zone, sc);
@@ -1877,17 +1854,6 @@ out:
         if (priority < 0)
                 priority = 0;
 
-        if (scanning_global_lru(sc)) {
-                for_each_zone_zonelist(zone, z, zonelist, high_zoneidx) {
-
-                        if (!cpuset_zone_allowed_hardwall(zone, GFP_KERNEL))
-                                continue;
-
-                        zone->prev_priority = priority;
-                }
-        } else
-                mem_cgroup_record_reclaim_priority(sc->mem_cgroup, priority);
-
         delayacct_freepages_end();
         put_mems_allowed();
 
@@ -2053,22 +2019,12 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order)
                 .order = order,
                 .mem_cgroup = NULL,
         };
-        /*
-         * temp_priority is used to remember the scanning priority at which
-         * this zone was successfully refilled to
-         * free_pages == high_wmark_pages(zone).
-         */
-        int temp_priority[MAX_NR_ZONES];
-
 loop_again:
         total_scanned = 0;
         sc.nr_reclaimed = 0;
         sc.may_writepage = !laptop_mode;
         count_vm_event(PAGEOUTRUN);
 
-        for (i = 0; i < pgdat->nr_zones; i++)
-                temp_priority[i] = DEF_PRIORITY;
-
         for (priority = DEF_PRIORITY; priority >= 0; priority--) {
                 int end_zone = 0;       /* Inclusive.  0 = ZONE_DMA */
                 unsigned long lru_pages = 0;
@@ -2136,9 +2092,7 @@ loop_again:
                         if (zone->all_unreclaimable && priority != DEF_PRIORITY)
                                 continue;
 
-                        temp_priority[i] = priority;
                         sc.nr_scanned = 0;
-                        note_zone_scanning_priority(zone, priority);
 
                         nid = pgdat->node_id;
                         zid = zone_idx(zone);
@@ -2211,16 +2165,6 @@ loop_again:
                         break;
         }
 out:
-        /*
-         * Note within each zone the priority level at which this zone was
-         * brought into a happy state.  So that the next thread which scans this
-         * zone will start out at that priority level.
-         */
-        for (i = 0; i < pgdat->nr_zones; i++) {
-                struct zone *zone = pgdat->node_zones + i;
-
-                zone->prev_priority = temp_priority[i];
-        }
         if (!all_zones_ok) {
                 cond_resched();
 
@@ -2639,7 +2583,6 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
                  */
                 priority = ZONE_RECLAIM_PRIORITY;
                 do {
-                        note_zone_scanning_priority(zone, priority);
                         shrink_zone(priority, zone, &sc);
                         priority--;
                 } while (priority >= 0 && sc.nr_reclaimed < nr_pages);