mm: page_alloc: fix zone allocation fairness on UP

[firefly-linux-kernel-4.4.55.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 18cee0d4c8a20705a4b3e7dd73e7d1d8a8b8d595..eee961958021e8c31e02ac6845b290a21d5a1690 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1612,7 +1612,7 @@ again:
        }
 
        __mod_zone_page_state(zone, NR_ALLOC_BATCH, -(1 << order));
-       if (zone_page_state(zone, NR_ALLOC_BATCH) == 0 &&
+       if (atomic_long_read(&zone->vm_stat[NR_ALLOC_BATCH]) <= 0 &&
            !zone_is_fair_depleted(zone))
                zone_set_flag(zone, ZONE_FAIR_DEPLETED);
 
@@ -5701,9 +5701,8 @@ static void __setup_per_zone_wmarks(void)
                zone->watermark[WMARK_HIGH] = min_wmark_pages(zone) + (tmp >> 1);
 
                __mod_zone_page_state(zone, NR_ALLOC_BATCH,
-                                     high_wmark_pages(zone) -
-                                     low_wmark_pages(zone) -
-                                     zone_page_state(zone, NR_ALLOC_BATCH));
+                       high_wmark_pages(zone) - low_wmark_pages(zone) -
+                       atomic_long_read(&zone->vm_stat[NR_ALLOC_BATCH]));
 
                setup_zone_migrate_reserve(zone);
                spin_unlock_irqrestore(&zone->lock, flags);