batman-adv: Add missing hardif_free_ref in forw_packet_free

[pandora-kernel.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7945247..d6e7ba7 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -53,6 +53,7 @@
 #include <linux/compaction.h>
 #include <trace/events/kmem.h>
 #include <linux/ftrace_event.h>
+#include <linux/memcontrol.h>
 
 #include <asm/tlbflush.h>
 #include <asm/div64.h>
@@ -565,7 +566,8 @@ static inline int free_pages_check(struct page *page)
        if (unlikely(page_mapcount(page) |
                (page->mapping != NULL)  |
                (atomic_read(&page->_count) != 0) |
-               (page->flags & PAGE_FLAGS_CHECK_AT_FREE))) {
+               (page->flags & PAGE_FLAGS_CHECK_AT_FREE) |
+               (mem_cgroup_bad_page_check(page)))) {
                bad_page(page);
                return 1;
        }
@@ -614,6 +616,10 @@ 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 */
@@ -750,7 +756,8 @@ static inline int check_new_page(struct page *page)
        if (unlikely(page_mapcount(page) |
                (page->mapping != NULL)  |
                (atomic_read(&page->_count) != 0)  |
-               (page->flags & PAGE_FLAGS_CHECK_AT_PREP))) {
+               (page->flags & PAGE_FLAGS_CHECK_AT_PREP) |
+               (mem_cgroup_bad_page_check(page)))) {
                bad_page(page);
                return 1;
        }
@@ -863,9 +870,8 @@ 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 +1339,7 @@ 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 +1720,20 @@ 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 +2105,7 @@ 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 +2177,25 @@ 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 +2445,42 @@ 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 +2522,8 @@ 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 +2591,8 @@ 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 +2612,11 @@ 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;
@@ -5621,4 +5687,5 @@ void dump_page(struct page *page)
                page, atomic_read(&page->_count), page_mapcount(page),
                page->mapping, page->index);
        dump_page_flags(page->flags);
+       mem_cgroup_print_bad_page(page);
 }