1 files changed, 72 insertions, 9 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7945247b1e53..3a58221f4c22 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -614,6 +614,10 @@ static void free_pcppages_bulk(struct zone *zone, int count,
                         list = &pcp->lists[migratetype];
                 } while (list_empty(list));
 
+                /* This is the only non-empty list. Free them all. */
+                if (batch_free == MIGRATE_PCPTYPES)
+                        batch_free = to_free;
+
                 do {
                         page = list_entry(list->prev, struct page, lru);
                         /* must delete as __free_one_page list manipulates */
@@ -863,9 +867,8 @@ static int move_freepages(struct zone *zone,
                 }
 
                 order = page_order(page);
-                list_del(&page->lru);
-                list_add(&page->lru,
-                        &zone->free_area[order].free_list[migratetype]);
+                list_move(&page->lru,
+                          &zone->free_area[order].free_list[migratetype]);
                 page += 1 << order;
                 pages_moved += 1 << order;
         }
@@ -1333,7 +1336,7 @@ again:
         }
 
         __count_zone_vm_events(PGALLOC, zone, 1 << order);
-        zone_statistics(preferred_zone, zone);
+        zone_statistics(preferred_zone, zone, gfp_flags);
         local_irq_restore(flags);
 
         VM_BUG_ON(bad_range(zone, page));
@@ -1714,6 +1717,20 @@ try_next_zone:
         return page;
 }
 
+/*
+ * Large machines with many possible nodes should not always dump per-node
+ * meminfo in irq context.
+ */
+static inline bool should_suppress_show_mem(void)
+{
+        bool ret = false;
+
+#if NODES_SHIFT > 8
+        ret = in_interrupt();
+#endif
+        return ret;
+}
+
 static inline int
 should_alloc_retry(gfp_t gfp_mask, unsigned int order,
                                 unsigned long pages_reclaimed)
@@ -2085,7 +2102,7 @@ rebalance:
                                         sync_migration);
         if (page)
                 goto got_pg;
-        sync_migration = true;
+        sync_migration = !(gfp_mask & __GFP_NO_KSWAPD);
 
         /* Try direct reclaim and then allocating */
         page = __alloc_pages_direct_reclaim(gfp_mask, order,
@@ -2157,11 +2174,25 @@ rebalance:
 
 nopage:
         if (!(gfp_mask & __GFP_NOWARN) && printk_ratelimit()) {
-                printk(KERN_WARNING "%s: page allocation failure."
-                        " order:%d, mode:0x%x\n",
+                unsigned int filter = SHOW_MEM_FILTER_NODES;
+
+                /*
+                 * This documents exceptions given to allocations in certain
+                 * contexts that are allowed to allocate outside current's set
+                 * of allowed nodes.
+                 */
+                if (!(gfp_mask & __GFP_NOMEMALLOC))
+                        if (test_thread_flag(TIF_MEMDIE) ||
+                            (current->flags & (PF_MEMALLOC | PF_EXITING)))
+                                filter &= ~SHOW_MEM_FILTER_NODES;
+                if (in_interrupt() || !wait)
+                        filter &= ~SHOW_MEM_FILTER_NODES;
+
+                pr_warning("%s: page allocation failure. order:%d, mode:0x%x\n",
                         current->comm, order, gfp_mask);
                 dump_stack();
-                show_mem();
+                if (!should_suppress_show_mem())
+                        __show_mem(filter);
         }
         return page;
 got_pg:
@@ -2411,19 +2442,42 @@ void si_meminfo_node(struct sysinfo *val, int nid)
 }
 #endif
 
+/*
+ * Determine whether the zone's node should be displayed or not, depending on
+ * whether SHOW_MEM_FILTER_NODES was passed to __show_free_areas().
+ */
+static bool skip_free_areas_zone(unsigned int flags, const struct zone *zone)
+{
+        bool ret = false;
+
+        if (!(flags & SHOW_MEM_FILTER_NODES))
+                goto out;
+
+        get_mems_allowed();
+        ret = !node_isset(zone->zone_pgdat->node_id,
+                                cpuset_current_mems_allowed);
+        put_mems_allowed();
+out:
+        return ret;
+}
+
 #define K(x) ((x) << (PAGE_SHIFT-10))
 
 /*
  * Show free area list (used inside shift_scroll-lock stuff)
  * We also calculate the percentage fragmentation. We do this by counting the
  * memory on each free list with the exception of the first item on the list.
+ * Suppresses nodes that are not allowed by current's cpuset if
+ * SHOW_MEM_FILTER_NODES is passed.
  */
-void show_free_areas(void)
+void __show_free_areas(unsigned int filter)
 {
         int cpu;
         struct zone *zone;
 
         for_each_populated_zone(zone) {
+                if (skip_free_areas_zone(filter, zone))
+                        continue;
                 show_node(zone);
                 printk("%s per-cpu:\n", zone->name);
 
@@ -2465,6 +2519,8 @@ void show_free_areas(void)
         for_each_populated_zone(zone) {
                 int i;
 
+                if (skip_free_areas_zone(filter, zone))
+                        continue;
                 show_node(zone);
                 printk("%s"
                         " free:%lukB"
@@ -2532,6 +2588,8 @@ void show_free_areas(void)
         for_each_populated_zone(zone) {
                 unsigned long nr[MAX_ORDER], flags, order, total = 0;
 
+                if (skip_free_areas_zone(filter, zone))
+                        continue;
                 show_node(zone);
                 printk("%s: ", zone->name);
 
@@ -2551,6 +2609,11 @@ void show_free_areas(void)
         show_swap_cache_info();
 }
 
+void show_free_areas(void)
+{
+        __show_free_areas(0);
+}
+
 static void zoneref_set_zone(struct zone *zone, struct zoneref *zoneref)
 {
         zoneref->zone = zone;