Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:

 - large KASAN update to use arm's "software tag-based mode"

 - a few misc things

 - sh updates

 - ocfs2 updates

 - just about all of MM

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (167 commits)
  kernel/fork.c: mark 'stack_vm_area' with __maybe_unused
  memcg, oom: notify on oom killer invocation from the charge path
  mm, swap: fix swapoff with KSM pages
  include/linux/gfp.h: fix typo
  mm/hmm: fix memremap.h, move dev_page_fault_t callback to hmm
  hugetlbfs: Use i_mmap_rwsem to fix page fault/truncate race
  hugetlbfs: use i_mmap_rwsem for more pmd sharing synchronization
  memory_hotplug: add missing newlines to debugging output
  mm: remove __hugepage_set_anon_rmap()
  include/linux/vmstat.h: remove unused page state adjustment macro
  mm/page_alloc.c: allow error injection
  mm: migrate: drop unused argument of migrate_page_move_mapping()
  blkdev: avoid migration stalls for blkdev pages
  mm: migrate: provide buffer_migrate_page_norefs()
  mm: migrate: move migrate_page_lock_buffers()
  mm: migrate: lock buffers before migrate_page_move_mapping()
  mm: migration: factor out code to compute expected number of page references
  mm, page_alloc: enable pcpu_drain with zone capability
  kmemleak: add config to select auto scan
  mm/page_alloc.c: don't call kasan_free_pages() at deferred mem init
  ...

1 files changed, 281 insertions, 123 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e95b5b7c9c3d..cde5dac6229a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -16,6 +16,7 @@
 
 #include <linux/stddef.h>
 #include <linux/mm.h>
+#include <linux/highmem.h>
 #include <linux/swap.h>
 #include <linux/interrupt.h>
 #include <linux/pagemap.h>
@@ -96,8 +97,12 @@ int _node_numa_mem_[MAX_NUMNODES];
 #endif
 
 /* work_structs for global per-cpu drains */
+struct pcpu_drain {
+	struct zone *zone;
+	struct work_struct work;
+};
 DEFINE_MUTEX(pcpu_drain_mutex);
-DEFINE_PER_CPU(struct work_struct, pcpu_drain);
+DEFINE_PER_CPU(struct pcpu_drain, pcpu_drain);
 
 #ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY
 volatile unsigned long latent_entropy __latent_entropy;
@@ -121,10 +126,8 @@ nodemask_t node_states[NR_NODE_STATES] __read_mostly = {
 };
 EXPORT_SYMBOL(node_states);
 
-/* Protect totalram_pages and zone->managed_pages */
-static DEFINE_SPINLOCK(managed_page_count_lock);
-
-unsigned long totalram_pages __read_mostly;
+atomic_long_t _totalram_pages __read_mostly;
+EXPORT_SYMBOL(_totalram_pages);
 unsigned long totalreserve_pages __read_mostly;
 unsigned long totalcma_pages __read_mostly;
 
@@ -237,7 +240,7 @@ static char * const zone_names[MAX_NR_ZONES] = {
 #endif
 };
 
-char * const migratetype_names[MIGRATE_TYPES] = {
+const char * const migratetype_names[MIGRATE_TYPES] = {
 	"Unmovable",
 	"Movable",
 	"Reclaimable",
@@ -263,20 +266,21 @@ compound_page_dtor * const compound_page_dtors[] = {
 
 int min_free_kbytes = 1024;
 int user_min_free_kbytes = -1;
+int watermark_boost_factor __read_mostly = 15000;
 int watermark_scale_factor = 10;
 
-static unsigned long nr_kernel_pages __meminitdata;
-static unsigned long nr_all_pages __meminitdata;
-static unsigned long dma_reserve __meminitdata;
+static unsigned long nr_kernel_pages __initdata;
+static unsigned long nr_all_pages __initdata;
+static unsigned long dma_reserve __initdata;
 
 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
-static unsigned long arch_zone_lowest_possible_pfn[MAX_NR_ZONES] __meminitdata;
-static unsigned long arch_zone_highest_possible_pfn[MAX_NR_ZONES] __meminitdata;
+static unsigned long arch_zone_lowest_possible_pfn[MAX_NR_ZONES] __initdata;
+static unsigned long arch_zone_highest_possible_pfn[MAX_NR_ZONES] __initdata;
 static unsigned long required_kernelcore __initdata;
 static unsigned long required_kernelcore_percent __initdata;
 static unsigned long required_movablecore __initdata;
 static unsigned long required_movablecore_percent __initdata;
-static unsigned long zone_movable_pfn[MAX_NUMNODES] __meminitdata;
+static unsigned long zone_movable_pfn[MAX_NUMNODES] __initdata;
 static bool mirrored_kernelcore __meminitdata;
 
 /* movable_zone is the "real" zone pages in ZONE_MOVABLE are taken from */
@@ -294,6 +298,32 @@ EXPORT_SYMBOL(nr_online_nodes);
 int page_group_by_mobility_disabled __read_mostly;
 
 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
+/*
+ * During boot we initialize deferred pages on-demand, as needed, but once
+ * page_alloc_init_late() has finished, the deferred pages are all initialized,
+ * and we can permanently disable that path.
+ */
+static DEFINE_STATIC_KEY_TRUE(deferred_pages);
+
+/*
+ * Calling kasan_free_pages() only after deferred memory initialization
+ * has completed. Poisoning pages during deferred memory init will greatly
+ * lengthen the process and cause problem in large memory systems as the
+ * deferred pages initialization is done with interrupt disabled.
+ *
+ * Assuming that there will be no reference to those newly initialized
+ * pages before they are ever allocated, this should have no effect on
+ * KASAN memory tracking as the poison will be properly inserted at page
+ * allocation time. The only corner case is when pages are allocated by
+ * on-demand allocation and then freed again before the deferred pages
+ * initialization is done, but this is not likely to happen.
+ */
+static inline void kasan_free_nondeferred_pages(struct page *page, int order)
+{
+	if (!static_branch_unlikely(&deferred_pages))
+		kasan_free_pages(page, order);
+}
+
 /* Returns true if the struct page for the pfn is uninitialised */
 static inline bool __meminit early_page_uninitialised(unsigned long pfn)
 {
@@ -326,8 +356,13 @@ defer_init(int nid, unsigned long pfn, unsigned long end_pfn)
 	/* Always populate low zones for address-constrained allocations */
 	if (end_pfn < pgdat_end_pfn(NODE_DATA(nid)))
 		return false;
+
+	/*
+	 * We start only with one section of pages, more pages are added as
+	 * needed until the rest of deferred pages are initialized.
+	 */
 	nr_initialised++;
-	if ((nr_initialised > NODE_DATA(nid)->static_init_pgcnt) &&
+	if ((nr_initialised > PAGES_PER_SECTION) &&
 	    (pfn & (PAGES_PER_SECTION - 1)) == 0) {
 		NODE_DATA(nid)->first_deferred_pfn = pfn;
 		return true;
@@ -335,6 +370,8 @@ defer_init(int nid, unsigned long pfn, unsigned long end_pfn)
 	return false;
 }
 #else
+#define kasan_free_nondeferred_pages(p, o)	kasan_free_pages(p, o)
+
 static inline bool early_page_uninitialised(unsigned long pfn)
 {
 	return false;
@@ -426,6 +463,7 @@ void set_pfnblock_flags_mask(struct page *page, unsigned long flags,
 	unsigned long old_word, word;
 
 	BUILD_BUG_ON(NR_PAGEBLOCK_BITS != 4);
+	BUILD_BUG_ON(MIGRATE_TYPES > (1 << PB_migratetype_bits));
 
 	bitmap = get_pageblock_bitmap(page, pfn);
 	bitidx = pfn_to_bitidx(page, pfn);
@@ -1037,7 +1075,7 @@ static __always_inline bool free_pages_prepare(struct page *page,
 	arch_free_page(page, order);
 	kernel_poison_pages(page, 1 << order, 0);
 	kernel_map_pages(page, 1 << order, 0);
-	kasan_free_pages(page, order);
+	kasan_free_nondeferred_pages(page, order);
 
 	return true;
 }
@@ -1183,6 +1221,7 @@ static void __meminit __init_single_page(struct page *page, unsigned long pfn,
 	init_page_count(page);
 	page_mapcount_reset(page);
 	page_cpupid_reset_last(page);
+	page_kasan_tag_reset(page);
 
 	INIT_LIST_HEAD(&page->lru);
 #ifdef WANT_PAGE_VIRTUAL
@@ -1279,7 +1318,7 @@ static void __init __free_pages_boot_core(struct page *page, unsigned int order)
 	__ClearPageReserved(p);
 	set_page_count(p, 0);
 
-	page_zone(page)->managed_pages += nr_pages;
+	atomic_long_add(nr_pages, &page_zone(page)->managed_pages);
 	set_page_refcounted(page);
 	__free_pages(page, order);
 }
@@ -1606,13 +1645,6 @@ static int __init deferred_init_memmap(void *data)
 }
 
 /*
- * During boot we initialize deferred pages on-demand, as needed, but once
- * page_alloc_init_late() has finished, the deferred pages are all initialized,
- * and we can permanently disable that path.
- */
-static DEFINE_STATIC_KEY_TRUE(deferred_pages);
-
-/*
  * If this zone has deferred pages, try to grow it by initializing enough
  * deferred pages to satisfy the allocation specified by order, rounded up to
  * the nearest PAGES_PER_SECTION boundary.  So we're adding memory in increments
@@ -1981,8 +2013,8 @@ struct page *__rmqueue_smallest(struct zone *zone, unsigned int order,
  */
 static int fallbacks[MIGRATE_TYPES][4] = {
 	[MIGRATE_UNMOVABLE]   = { MIGRATE_RECLAIMABLE, MIGRATE_MOVABLE,   MIGRATE_TYPES },
-	[MIGRATE_RECLAIMABLE] = { MIGRATE_UNMOVABLE,   MIGRATE_MOVABLE,   MIGRATE_TYPES },
 	[MIGRATE_MOVABLE]     = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE, MIGRATE_TYPES },
+	[MIGRATE_RECLAIMABLE] = { MIGRATE_UNMOVABLE,   MIGRATE_MOVABLE,   MIGRATE_TYPES },
 #ifdef CONFIG_CMA
 	[MIGRATE_CMA]         = { MIGRATE_TYPES }, /* Never used */
 #endif
@@ -2129,6 +2161,21 @@ static bool can_steal_fallback(unsigned int order, int start_mt)
 	return false;
 }
 
+static inline void boost_watermark(struct zone *zone)
+{
+	unsigned long max_boost;
+
+	if (!watermark_boost_factor)
+		return;
+
+	max_boost = mult_frac(zone->_watermark[WMARK_HIGH],
+			watermark_boost_factor, 10000);
+	max_boost = max(pageblock_nr_pages, max_boost);
+
+	zone->watermark_boost = min(zone->watermark_boost + pageblock_nr_pages,
+		max_boost);
+}
+
 /*
  * This function implements actual steal behaviour. If order is large enough,
  * we can steal whole pageblock. If not, we first move freepages in this
@@ -2138,7 +2185,7 @@ static bool can_steal_fallback(unsigned int order, int start_mt)
  * itself, so pages freed in the future will be put on the correct free list.
  */
 static void steal_suitable_fallback(struct zone *zone, struct page *page,
-					int start_type, bool whole_block)
+		unsigned int alloc_flags, int start_type, bool whole_block)
 {
 	unsigned int current_order = page_order(page);
 	struct free_area *area;
@@ -2160,6 +2207,15 @@ static void steal_suitable_fallback(struct zone *zone, struct page *page,
 		goto single_page;
 	}
 
+	/*
+	 * Boost watermarks to increase reclaim pressure to reduce the
+	 * likelihood of future fallbacks. Wake kswapd now as the node
+	 * may be balanced overall and kswapd will not wake naturally.
+	 */
+	boost_watermark(zone);
+	if (alloc_flags & ALLOC_KSWAPD)
+		wakeup_kswapd(zone, 0, 0, zone_idx(zone));
+
 	/* We are not allowed to try stealing from the whole block */
 	if (!whole_block)
 		goto single_page;
@@ -2258,7 +2314,7 @@ static void reserve_highatomic_pageblock(struct page *page, struct zone *zone,
 	 * Limit the number reserved to 1 pageblock or roughly 1% of a zone.
 	 * Check is race-prone but harmless.
 	 */
-	max_managed = (zone->managed_pages / 100) + pageblock_nr_pages;
+	max_managed = (zone_managed_pages(zone) / 100) + pageblock_nr_pages;
 	if (zone->nr_reserved_highatomic >= max_managed)
 		return;
 
@@ -2375,20 +2431,30 @@ static bool unreserve_highatomic_pageblock(const struct alloc_context *ac,
  * condition simpler.
  */
 static __always_inline bool
-__rmqueue_fallback(struct zone *zone, int order, int start_migratetype)
+__rmqueue_fallback(struct zone *zone, int order, int start_migratetype,
+						unsigned int alloc_flags)
 {
 	struct free_area *area;
 	int current_order;
+	int min_order = order;
 	struct page *page;
 	int fallback_mt;
 	bool can_steal;
 
 	/*
+	 * Do not steal pages from freelists belonging to other pageblocks
+	 * i.e. orders < pageblock_order. If there are no local zones free,
+	 * the zonelists will be reiterated without ALLOC_NOFRAGMENT.
+	 */
+	if (alloc_flags & ALLOC_NOFRAGMENT)
+		min_order = pageblock_order;
+
+	/*
 	 * Find the largest available free page in the other list. This roughly
 	 * approximates finding the pageblock with the most free pages, which
 	 * would be too costly to do exactly.
 	 */
-	for (current_order = MAX_ORDER - 1; current_order >= order;
+	for (current_order = MAX_ORDER - 1; current_order >= min_order;
 				--current_order) {
 		area = &(zone->free_area[current_order]);
 		fallback_mt = find_suitable_fallback(area, current_order,
@@ -2433,7 +2499,8 @@ do_steal:
 	page = list_first_entry(&area->free_list[fallback_mt],
 							struct page, lru);
 
-	steal_suitable_fallback(zone, page, start_migratetype, can_steal);
+	steal_suitable_fallback(zone, page, alloc_flags, start_migratetype,
+								can_steal);
 
 	trace_mm_page_alloc_extfrag(page, order, current_order,
 		start_migratetype, fallback_mt);
@@ -2447,7 +2514,8 @@ do_steal:
  * Call me with the zone->lock already held.
  */
 static __always_inline struct page *
-__rmqueue(struct zone *zone, unsigned int order, int migratetype)
+__rmqueue(struct zone *zone, unsigned int order, int migratetype,
+						unsigned int alloc_flags)
 {
 	struct page *page;
 
@@ -2457,7 +2525,8 @@ retry:
 		if (migratetype == MIGRATE_MOVABLE)
 			page = __rmqueue_cma_fallback(zone, order);
 
-		if (!page && __rmqueue_fallback(zone, order, migratetype))
+		if (!page && __rmqueue_fallback(zone, order, migratetype,
+								alloc_flags))
 			goto retry;
 	}
 
@@ -2472,13 +2541,14 @@ retry:
  */
 static int rmqueue_bulk(struct zone *zone, unsigned int order,
 			unsigned long count, struct list_head *list,
-			int migratetype)
+			int migratetype, unsigned int alloc_flags)
 {
 	int i, alloced = 0;
 
 	spin_lock(&zone->lock);
 	for (i = 0; i < count; ++i) {
-		struct page *page = __rmqueue(zone, order, migratetype);
+		struct page *page = __rmqueue(zone, order, migratetype,
+								alloc_flags);
 		if (unlikely(page == NULL))
 			break;
 
@@ -2592,6 +2662,10 @@ void drain_local_pages(struct zone *zone)
 
 static void drain_local_pages_wq(struct work_struct *work)
 {
+	struct pcpu_drain *drain;
+
+	drain = container_of(work, struct pcpu_drain, work);
+
 	/*
 	 * drain_all_pages doesn't use proper cpu hotplug protection so
 	 * we can race with cpu offline when the WQ can move this from
@@ -2600,7 +2674,7 @@ static void drain_local_pages_wq(struct work_struct *work)
 	 * a different one.
 	 */
 	preempt_disable();
-	drain_local_pages(NULL);
+	drain_local_pages(drain->zone);
 	preempt_enable();
 }
 
@@ -2671,12 +2745,14 @@ void drain_all_pages(struct zone *zone)
 	}
 
 	for_each_cpu(cpu, &cpus_with_pcps) {
-		struct work_struct *work = per_cpu_ptr(&pcpu_drain, cpu);
-		INIT_WORK(work, drain_local_pages_wq);
-		queue_work_on(cpu, mm_percpu_wq, work);
+		struct pcpu_drain *drain = per_cpu_ptr(&pcpu_drain, cpu);
+
+		drain->zone = zone;
+		INIT_WORK(&drain->work, drain_local_pages_wq);
+		queue_work_on(cpu, mm_percpu_wq, &drain->work);
 	}
 	for_each_cpu(cpu, &cpus_with_pcps)
-		flush_work(per_cpu_ptr(&pcpu_drain, cpu));
+		flush_work(&per_cpu_ptr(&pcpu_drain, cpu)->work);
 
 	mutex_unlock(&pcpu_drain_mutex);
 }
@@ -2934,6 +3010,7 @@ static inline void zone_statistics(struct zone *preferred_zone, struct zone *z)
 
 /* Remove page from the per-cpu list, caller must protect the list */
 static struct page *__rmqueue_pcplist(struct zone *zone, int migratetype,
+			unsigned int alloc_flags,
 			struct per_cpu_pages *pcp,
 			struct list_head *list)
 {
@@ -2943,7 +3020,7 @@ static struct page *__rmqueue_pcplist(struct zone *zone, int migratetype,
 		if (list_empty(list)) {
 			pcp->count += rmqueue_bulk(zone, 0,
 					pcp->batch, list,
-					migratetype);
+					migratetype, alloc_flags);
 			if (unlikely(list_empty(list)))
 				return NULL;
 		}
@@ -2959,7 +3036,8 @@ static struct page *__rmqueue_pcplist(struct zone *zone, int migratetype,
 /* Lock and remove page from the per-cpu list */
 static struct page *rmqueue_pcplist(struct zone *preferred_zone,
 			struct zone *zone, unsigned int order,
-			gfp_t gfp_flags, int migratetype)
+			gfp_t gfp_flags, int migratetype,
+			unsigned int alloc_flags)
 {
 	struct per_cpu_pages *pcp;
 	struct list_head *list;
@@ -2969,7 +3047,7 @@ static struct page *rmqueue_pcplist(struct zone *preferred_zone,
 	local_irq_save(flags);
 	pcp = &this_cpu_ptr(zone->pageset)->pcp;
 	list = &pcp->lists[migratetype];
-	page = __rmqueue_pcplist(zone,  migratetype, pcp, list);
+	page = __rmqueue_pcplist(zone,  migratetype, alloc_flags, pcp, list);
 	if (page) {
 		__count_zid_vm_events(PGALLOC, page_zonenum(page), 1 << order);
 		zone_statistics(preferred_zone, zone);
@@ -2992,7 +3070,7 @@ struct page *rmqueue(struct zone *preferred_zone,
 
 	if (likely(order == 0)) {
 		page = rmqueue_pcplist(preferred_zone, zone, order,
-				gfp_flags, migratetype);
+				gfp_flags, migratetype, alloc_flags);
 		goto out;
 	}
 
@@ -3011,7 +3089,7 @@ struct page *rmqueue(struct zone *preferred_zone,
 				trace_mm_page_alloc_zone_locked(page, order, migratetype);
 		}
 		if (!page)
-			page = __rmqueue(zone, order, migratetype);
+			page = __rmqueue(zone, order, migratetype, alloc_flags);
 	} while (page && check_new_pages(page, order));
 	spin_unlock(&zone->lock);
 	if (!page)
@@ -3053,7 +3131,7 @@ static int __init setup_fail_page_alloc(char *str)
 }
 __setup("fail_page_alloc=", setup_fail_page_alloc);
 
-static bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
+static bool __should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
 {
 	if (order < fail_page_alloc.min_order)
 		return false;
@@ -3103,13 +3181,19 @@ late_initcall(fail_page_alloc_debugfs);
 
 #else /* CONFIG_FAIL_PAGE_ALLOC */
 
-static inline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
+static inline bool __should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
 {
 	return false;
 }
 
 #endif /* CONFIG_FAIL_PAGE_ALLOC */
 
+static noinline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
+{
+	return __should_fail_alloc_page(gfp_mask, order);
+}
+ALLOW_ERROR_INJECTION(should_fail_alloc_page, TRUE);
+
 /*
  * Return true if free base pages are above 'mark'. For high-order checks it
  * will return true of the order-0 watermark is reached and there is at least
@@ -3254,6 +3338,40 @@ static bool zone_allows_reclaim(struct zone *local_zone, struct zone *zone)
 #endif	/* CONFIG_NUMA */
 
 /*
+ * The restriction on ZONE_DMA32 as being a suitable zone to use to avoid
+ * fragmentation is subtle. If the preferred zone was HIGHMEM then
+ * premature use of a lower zone may cause lowmem pressure problems that
+ * are worse than fragmentation. If the next zone is ZONE_DMA then it is
+ * probably too small. It only makes sense to spread allocations to avoid
+ * fragmentation between the Normal and DMA32 zones.
+ */
+static inline unsigned int
+alloc_flags_nofragment(struct zone *zone, gfp_t gfp_mask)
+{
+	unsigned int alloc_flags = 0;
+
+	if (gfp_mask & __GFP_KSWAPD_RECLAIM)
+		alloc_flags |= ALLOC_KSWAPD;
+
+#ifdef CONFIG_ZONE_DMA32
+	if (zone_idx(zone) != ZONE_NORMAL)
+		goto out;
+
+	/*
+	 * If ZONE_DMA32 exists, assume it is the one after ZONE_NORMAL and
+	 * the pointer is within zone->zone_pgdat->node_zones[]. Also assume
+	 * on UMA that if Normal is populated then so is DMA32.
+	 */
+	BUILD_BUG_ON(ZONE_NORMAL - ZONE_DMA32 != 1);
+	if (nr_online_nodes > 1 && !populated_zone(--zone))
+		goto out;
+
+out:
+#endif /* CONFIG_ZONE_DMA32 */
+	return alloc_flags;
+}
+
+/*
  * get_page_from_freelist goes through the zonelist trying to allocate
  * a page.
  */
@@ -3261,14 +3379,18 @@ static struct page *
 get_page_from_freelist(gfp_t gfp_mask, unsigned int order, int alloc_flags,
 						const struct alloc_context *ac)
 {
-	struct zoneref *z = ac->preferred_zoneref;
+	struct zoneref *z;
 	struct zone *zone;
 	struct pglist_data *last_pgdat_dirty_limit = NULL;
+	bool no_fallback;
 
+retry:
 	/*
 	 * Scan zonelist, looking for a zone with enough free.
 	 * See also __cpuset_node_allowed() comment in kernel/cpuset.c.
 	 */
+	no_fallback = alloc_flags & ALLOC_NOFRAGMENT;
+	z = ac->preferred_zoneref;
 	for_next_zone_zonelist_nodemask(zone, z, ac->zonelist, ac->high_zoneidx,
 								ac->nodemask) {
 		struct page *page;
@@ -3307,7 +3429,23 @@ get_page_from_freelist(gfp_t gfp_mask, unsigned int order, int alloc_flags,
 			}
 		}
 
-		mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK];
+		if (no_fallback && nr_online_nodes > 1 &&
+		    zone != ac->preferred_zoneref->zone) {
+			int local_nid;
+
+			/*
+			 * If moving to a remote node, retry but allow
+			 * fragmenting fallbacks. Locality is more important
+			 * than fragmentation avoidance.
+			 */
+			local_nid = zone_to_nid(ac->preferred_zoneref->zone);
+			if (zone_to_nid(zone) != local_nid) {
+				alloc_flags &= ~ALLOC_NOFRAGMENT;
+				goto retry;
+			}
+		}
+
+		mark = wmark_pages(zone, alloc_flags & ALLOC_WMARK_MASK);
 		if (!zone_watermark_fast(zone, order, mark,
 				       ac_classzone_idx(ac), alloc_flags)) {
 			int ret;
@@ -3374,6 +3512,15 @@ try_this_zone:
 		}
 	}
 
+	/*
+	 * It's possible on a UMA machine to get through all zones that are
+	 * fragmented. If avoiding fragmentation, reset and try again.
+	 */
+	if (no_fallback) {
+		alloc_flags &= ~ALLOC_NOFRAGMENT;
+		goto retry;
+	}
+
 	return NULL;
 }
 
@@ -3413,13 +3560,13 @@ void warn_alloc(gfp_t gfp_mask, nodemask_t *nodemask, const char *fmt, ...)
 	va_start(args, fmt);
 	vaf.fmt = fmt;
 	vaf.va = &args;
-	pr_warn("%s: %pV, mode:%#x(%pGg), nodemask=%*pbl\n",
+	pr_warn("%s: %pV, mode:%#x(%pGg), nodemask=%*pbl",
 			current->comm, &vaf, gfp_mask, &gfp_mask,
 			nodemask_pr_args(nodemask));
 	va_end(args);
 
 	cpuset_print_current_mems_allowed();
-
+	pr_cont("\n");
 	dump_stack();
 	warn_alloc_show_mem(gfp_mask, nodemask);
 }
@@ -3861,6 +4008,9 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
 	} else if (unlikely(rt_task(current)) && !in_interrupt())
 		alloc_flags |= ALLOC_HARDER;
 
+	if (gfp_mask & __GFP_KSWAPD_RECLAIM)
+		alloc_flags |= ALLOC_KSWAPD;
+
 #ifdef CONFIG_CMA
 	if (gfpflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
 		alloc_flags |= ALLOC_CMA;
@@ -4092,7 +4242,7 @@ retry_cpuset:
 	if (!ac->preferred_zoneref->zone)
 		goto nopage;
 
-	if (gfp_mask & __GFP_KSWAPD_RECLAIM)
+	if (alloc_flags & ALLOC_KSWAPD)
 		wake_all_kswapds(order, gfp_mask, ac);
 
 	/*
@@ -4150,7 +4300,7 @@ retry_cpuset:
 
 retry:
 	/* Ensure kswapd doesn't accidentally go to sleep as long as we loop */
-	if (gfp_mask & __GFP_KSWAPD_RECLAIM)
+	if (alloc_flags & ALLOC_KSWAPD)
 		wake_all_kswapds(order, gfp_mask, ac);
 
 	reserve_flags = __gfp_pfmemalloc_flags(gfp_mask);
@@ -4369,6 +4519,12 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, int preferred_nid,
 
 	finalise_ac(gfp_mask, &ac);
 
+	/*
+	 * Forbid the first pass from falling back to types that fragment
+	 * memory until all local zones are considered.
+	 */
+	alloc_flags |= alloc_flags_nofragment(ac.preferred_zoneref->zone, gfp_mask);
+
 	/* First allocation attempt */
 	page = get_page_from_freelist(alloc_mask, order, alloc_flags, &ac);
 	if (likely(page))
@@ -4427,16 +4583,19 @@ unsigned long get_zeroed_page(gfp_t gfp_mask)
 }
 EXPORT_SYMBOL(get_zeroed_page);
 
-void __free_pages(struct page *page, unsigned int order)
+static inline void free_the_page(struct page *page, unsigned int order)
 {
-	if (put_page_testzero(page)) {
-		if (order == 0)
-			free_unref_page(page);
-		else
-			__free_pages_ok(page, order);
-	}
+	if (order == 0)		/* Via pcp? */
+		free_unref_page(page);
+	else
+		__free_pages_ok(page, order);
 }
 
+void __free_pages(struct page *page, unsigned int order)
+{
+	if (put_page_testzero(page))
+		free_the_page(page, order);
+}
 EXPORT_SYMBOL(__free_pages);
 
 void free_pages(unsigned long addr, unsigned int order)
@@ -4485,14 +4644,8 @@ void __page_frag_cache_drain(struct page *page, unsigned int count)
 {
 	VM_BUG_ON_PAGE(page_ref_count(page) == 0, page);
 
-	if (page_ref_sub_and_test(page, count)) {
-		unsigned int order = compound_order(page);
-
-		if (order == 0)
-			free_unref_page(page);
-		else
-			__free_pages_ok(page, order);
-	}
+	if (page_ref_sub_and_test(page, count))
+		free_the_page(page, compound_order(page));
 }
 EXPORT_SYMBOL(__page_frag_cache_drain);
 
@@ -4558,7 +4711,7 @@ void page_frag_free(void *addr)
 	struct page *page = virt_to_head_page(addr);
 
 	if (unlikely(put_page_testzero(page)))
-		__free_pages_ok(page, compound_order(page));
+		free_the_page(page, compound_order(page));
 }
 EXPORT_SYMBOL(page_frag_free);
 
@@ -4660,7 +4813,7 @@ static unsigned long nr_free_zone_pages(int offset)
 	struct zonelist *zonelist = node_zonelist(numa_node_id(), GFP_KERNEL);
 
 	for_each_zone_zonelist(zone, z, zonelist, offset) {
-		unsigned long size = zone->managed_pages;
+		unsigned long size = zone_managed_pages(zone);
 		unsigned long high = high_wmark_pages(zone);
 		if (size > high)
 			sum += size - high;
@@ -4712,7 +4865,7 @@ long si_mem_available(void)
 		pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
 
 	for_each_zone(zone)
-		wmark_low += zone->watermark[WMARK_LOW];
+		wmark_low += low_wmark_pages(zone);
 
 	/*
 	 * Estimate the amount of memory available for userspace allocations,
@@ -4746,11 +4899,11 @@ EXPORT_SYMBOL_GPL(si_mem_available);
 
 void si_meminfo(struct sysinfo *val)
 {
-	val->totalram = totalram_pages;
+	val->totalram = totalram_pages();
 	val->sharedram = global_node_page_state(NR_SHMEM);
 	val->freeram = global_zone_page_state(NR_FREE_PAGES);
 	val->bufferram = nr_blockdev_pages();
-	val->totalhigh = totalhigh_pages;
+	val->totalhigh = totalhigh_pages();
 	val->freehigh = nr_free_highpages();
 	val->mem_unit = PAGE_SIZE;
 }
@@ -4767,7 +4920,7 @@ void si_meminfo_node(struct sysinfo *val, int nid)
 	pg_data_t *pgdat = NODE_DATA(nid);
 
 	for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
-		managed_pages += pgdat->node_zones[zone_type].managed_pages;
+		managed_pages += zone_managed_pages(&pgdat->node_zones[zone_type]);
 	val->totalram = managed_pages;
 	val->sharedram = node_page_state(pgdat, NR_SHMEM);
 	val->freeram = sum_zone_node_page_state(nid, NR_FREE_PAGES);
@@ -4776,7 +4929,7 @@ void si_meminfo_node(struct sysinfo *val, int nid)
 		struct zone *zone = &pgdat->node_zones[zone_type];
 
 		if (is_highmem(zone)) {
-			managed_highpages += zone->managed_pages;
+			managed_highpages += zone_managed_pages(zone);
 			free_highpages += zone_page_state(zone, NR_FREE_PAGES);
 		}
 	}
@@ -4983,7 +5136,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
 			K(zone_page_state(zone, NR_ZONE_UNEVICTABLE)),
 			K(zone_page_state(zone, NR_ZONE_WRITE_PENDING)),
 			K(zone->present_pages),
-			K(zone->managed_pages),
+			K(zone_managed_pages(zone)),
 			K(zone_page_state(zone, NR_MLOCK)),
 			zone_page_state(zone, NR_KERNEL_STACK_KB),
 			K(zone_page_state(zone, NR_PAGETABLE)),
@@ -5655,7 +5808,7 @@ static int zone_batchsize(struct zone *zone)
 	 * The per-cpu-pages pools are set to around 1000th of the
 	 * size of the zone.
 	 */
-	batch = zone->managed_pages / 1024;
+	batch = zone_managed_pages(zone) / 1024;
 	/* But no more than a meg. */
 	if (batch * PAGE_SIZE > 1024 * 1024)
 		batch = (1024 * 1024) / PAGE_SIZE;
@@ -5736,7 +5889,6 @@ static void pageset_init(struct per_cpu_pageset *p)
 	memset(p, 0, sizeof(*p));
 
 	pcp = &p->pcp;
-	pcp->count = 0;
 	for (migratetype = 0; migratetype < MIGRATE_PCPTYPES; migratetype++)
 		INIT_LIST_HEAD(&pcp->lists[migratetype]);
 }
@@ -5766,7 +5918,7 @@ static void pageset_set_high_and_batch(struct zone *zone,
 {
 	if (percpu_pagelist_fraction)
 		pageset_set_high(pcp,
-			(zone->managed_pages /
+			(zone_managed_pages(zone) /
 				percpu_pagelist_fraction));
 	else
 		pageset_set_batch(pcp, zone_batchsize(zone));
@@ -5920,7 +6072,7 @@ void __init sparse_memory_present_with_active_regions(int nid)
  * with no available memory, a warning is printed and the start and end
  * PFNs will be 0.
  */
-void __meminit get_pfn_range_for_nid(unsigned int nid,
+void __init get_pfn_range_for_nid(unsigned int nid,
 			unsigned long *start_pfn, unsigned long *end_pfn)
 {
 	unsigned long this_start_pfn, this_end_pfn;
@@ -5969,7 +6121,7 @@ static void __init find_usable_zone_for_movable(void)
  * highest usable zone for ZONE_MOVABLE. This preserves the assumption that
  * zones within a node are in order of monotonic increases memory addresses
  */
-static void __meminit adjust_zone_range_for_zone_movable(int nid,
+static void __init adjust_zone_range_for_zone_movable(int nid,
 					unsigned long zone_type,
 					unsigned long node_start_pfn,
 					unsigned long node_end_pfn,
@@ -6000,7 +6152,7 @@ static void __meminit adjust_zone_range_for_zone_movable(int nid,
  * Return the number of pages a zone spans in a node, including holes
  * present_pages = zone_spanned_pages_in_node() - zone_absent_pages_in_node()
  */
-static unsigned long __meminit zone_spanned_pages_in_node(int nid,
+static unsigned long __init zone_spanned_pages_in_node(int nid,
 					unsigned long zone_type,
 					unsigned long node_start_pfn,
 					unsigned long node_end_pfn,
@@ -6035,7 +6187,7 @@ static unsigned long __meminit zone_spanned_pages_in_node(int nid,
  * Return the number of holes in a range on a node. If nid is MAX_NUMNODES,
  * then all holes in the requested range will be accounted for.
  */
-unsigned long __meminit __absent_pages_in_range(int nid,
+unsigned long __init __absent_pages_in_range(int nid,
 				unsigned long range_start_pfn,
 				unsigned long range_end_pfn)
 {
@@ -6065,7 +6217,7 @@ unsigned long __init absent_pages_in_range(unsigned long start_pfn,
 }
 
 /* Return the number of page frames in holes in a zone on a node */
-static unsigned long __meminit zone_absent_pages_in_node(int nid,
+static unsigned long __init zone_absent_pages_in_node(int nid,
 					unsigned long zone_type,
 					unsigned long node_start_pfn,
 					unsigned long node_end_pfn,
@@ -6117,7 +6269,7 @@ static unsigned long __meminit zone_absent_pages_in_node(int nid,
 }
 
 #else /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
-static inline unsigned long __meminit zone_spanned_pages_in_node(int nid,
+static inline unsigned long __init zone_spanned_pages_in_node(int nid,
 					unsigned long zone_type,
 					unsigned long node_start_pfn,
 					unsigned long node_end_pfn,
@@ -6136,7 +6288,7 @@ static inline unsigned long __meminit zone_spanned_pages_in_node(int nid,
 	return zones_size[zone_type];
 }
 
-static inline unsigned long __meminit zone_absent_pages_in_node(int nid,
+static inline unsigned long __init zone_absent_pages_in_node(int nid,
 						unsigned long zone_type,
 						unsigned long node_start_pfn,
 						unsigned long node_end_pfn,
@@ -6150,7 +6302,7 @@ static inline unsigned long __meminit zone_absent_pages_in_node(int nid,
 
 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
 
-static void __meminit calculate_node_totalpages(struct pglist_data *pgdat,
+static void __init calculate_node_totalpages(struct pglist_data *pgdat,
 						unsigned long node_start_pfn,
 						unsigned long node_end_pfn,
 						unsigned long *zones_size,
@@ -6323,7 +6475,7 @@ static void __meminit pgdat_init_internals(struct pglist_data *pgdat)
 static void __meminit zone_init_internals(struct zone *zone, enum zone_type idx, int nid,
 							unsigned long remaining_pages)
 {
-	zone->managed_pages = remaining_pages;
+	atomic_long_set(&zone->managed_pages, remaining_pages);
 	zone_set_nid(zone, nid);
 	zone->name = zone_names[idx];
 	zone->zone_pgdat = NODE_DATA(nid);
@@ -6476,12 +6628,6 @@ static void __ref alloc_node_mem_map(struct pglist_data *pgdat) { }
 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
 static inline void pgdat_set_deferred_range(pg_data_t *pgdat)
 {
-	/*
-	 * We start only with one section of pages, more pages are added as
-	 * needed until the rest of deferred pages are initialized.
-	 */
-	pgdat->static_init_pgcnt = min_t(unsigned long, PAGES_PER_SECTION,
-						pgdat->node_spanned_pages);
 	pgdat->first_deferred_pfn = ULONG_MAX;
 }
 #else
@@ -7075,18 +7221,16 @@ early_param("movablecore", cmdline_parse_movablecore);
 
 void adjust_managed_page_count(struct page *page, long count)
 {
-	spin_lock(&managed_page_count_lock);
-	page_zone(page)->managed_pages += count;
-	totalram_pages += count;
+	atomic_long_add(count, &page_zone(page)->managed_pages);
+	totalram_pages_add(count);
 #ifdef CONFIG_HIGHMEM
 	if (PageHighMem(page))
-		totalhigh_pages += count;
+		totalhigh_pages_add(count);
 #endif
-	spin_unlock(&managed_page_count_lock);
 }
 EXPORT_SYMBOL(adjust_managed_page_count);
 
-unsigned long free_reserved_area(void *start, void *end, int poison, char *s)
+unsigned long free_reserved_area(void *start, void *end, int poison, const char *s)
 {
 	void *pos;
 	unsigned long pages = 0;
@@ -7123,9 +7267,9 @@ EXPORT_SYMBOL(free_reserved_area);
 void free_highmem_page(struct page *page)
 {
 	__free_reserved_page(page);
-	totalram_pages++;
-	page_zone(page)->managed_pages++;
-	totalhigh_pages++;
+	totalram_pages_inc();
+	atomic_long_inc(&page_zone(page)->managed_pages);
+	totalhigh_pages_inc();
 }
 #endif
 
@@ -7174,10 +7318,10 @@ void __init mem_init_print_info(const char *str)
 		physpages << (PAGE_SHIFT - 10),
 		codesize >> 10, datasize >> 10, rosize >> 10,
 		(init_data_size + init_code_size) >> 10, bss_size >> 10,
-		(physpages - totalram_pages - totalcma_pages) << (PAGE_SHIFT - 10),
+		(physpages - totalram_pages() - totalcma_pages) << (PAGE_SHIFT - 10),
 		totalcma_pages << (PAGE_SHIFT - 10),
 #ifdef	CONFIG_HIGHMEM
-		totalhigh_pages << (PAGE_SHIFT - 10),
+		totalhigh_pages() << (PAGE_SHIFT - 10),
 #endif
 		str ? ", " : "", str ? str : "");
 }
@@ -7257,6 +7401,7 @@ static void calculate_totalreserve_pages(void)
 		for (i = 0; i < MAX_NR_ZONES; i++) {
 			struct zone *zone = pgdat->node_zones + i;
 			long max = 0;
+			unsigned long managed_pages = zone_managed_pages(zone);
 
 			/* Find valid and maximum lowmem_reserve in the zone */
 			for (j = i; j < MAX_NR_ZONES; j++) {
@@ -7267,8 +7412,8 @@ static void calculate_totalreserve_pages(void)
 			/* we treat the high watermark as reserved pages. */
 			max += high_wmark_pages(zone);
 
-			if (max > zone->managed_pages)
-				max = zone->managed_pages;
+			if (max > managed_pages)
+				max = managed_pages;
 
 			pgdat->totalreserve_pages += max;
 
@@ -7292,7 +7437,7 @@ static void setup_per_zone_lowmem_reserve(void)
 	for_each_online_pgdat(pgdat) {
 		for (j = 0; j < MAX_NR_ZONES; j++) {
 			struct zone *zone = pgdat->node_zones + j;
-			unsigned long managed_pages = zone->managed_pages;
+			unsigned long managed_pages = zone_managed_pages(zone);
 
 			zone->lowmem_reserve[j] = 0;
 
@@ -7310,7 +7455,7 @@ static void setup_per_zone_lowmem_reserve(void)
 					lower_zone->lowmem_reserve[j] =
 						managed_pages / sysctl_lowmem_reserve_ratio[idx];
 				}
-				managed_pages += lower_zone->managed_pages;
+				managed_pages += zone_managed_pages(lower_zone);
 			}
 		}
 	}
@@ -7329,14 +7474,14 @@ static void __setup_per_zone_wmarks(void)
 	/* Calculate total number of !ZONE_HIGHMEM pages */
 	for_each_zone(zone) {
 		if (!is_highmem(zone))
-			lowmem_pages += zone->managed_pages;
+			lowmem_pages += zone_managed_pages(zone);
 	}
 
 	for_each_zone(zone) {
 		u64 tmp;
 
 		spin_lock_irqsave(&zone->lock, flags);
-		tmp = (u64)pages_min * zone->managed_pages;
+		tmp = (u64)pages_min * zone_managed_pages(zone);
 		do_div(tmp, lowmem_pages);
 		if (is_highmem(zone)) {
 			/*
@@ -7350,15 +7495,15 @@ static void __setup_per_zone_wmarks(void)
 			 */
 			unsigned long min_pages;
 
-			min_pages = zone->managed_pages / 1024;
+			min_pages = zone_managed_pages(zone) / 1024;
 			min_pages = clamp(min_pages, SWAP_CLUSTER_MAX, 128UL);
-			zone->watermark[WMARK_MIN] = min_pages;
+			zone->_watermark[WMARK_MIN] = min_pages;
 		} else {
 			/*
 			 * If it's a lowmem zone, reserve a number of pages
 			 * proportionate to the zone's size.
 			 */
-			zone->watermark[WMARK_MIN] = tmp;
+			zone->_watermark[WMARK_MIN] = tmp;
 		}
 
 		/*
@@ -7367,11 +7512,12 @@ static void __setup_per_zone_wmarks(void)
 		 * ensure a minimum size on small systems.
 		 */
 		tmp = max_t(u64, tmp >> 2,
-			    mult_frac(zone->managed_pages,
+			    mult_frac(zone_managed_pages(zone),
 				      watermark_scale_factor, 10000));
 
-		zone->watermark[WMARK_LOW]  = min_wmark_pages(zone) + tmp;
-		zone->watermark[WMARK_HIGH] = min_wmark_pages(zone) + tmp * 2;
+		zone->_watermark[WMARK_LOW]  = min_wmark_pages(zone) + tmp;
+		zone->_watermark[WMARK_HIGH] = min_wmark_pages(zone) + tmp * 2;
+		zone->watermark_boost = 0;
 
 		spin_unlock_irqrestore(&zone->lock, flags);
 	}
@@ -7472,6 +7618,18 @@ int min_free_kbytes_sysctl_handler(struct ctl_table *table, int write,
 	return 0;
 }
 
+int watermark_boost_factor_sysctl_handler(struct ctl_table *table, int write,
+	void __user *buffer, size_t *length, loff_t *ppos)
+{
+	int rc;
+
+	rc = proc_dointvec_minmax(table, write, buffer, length, ppos);
+	if (rc)
+		return rc;
+
+	return 0;
+}
+
 int watermark_scale_factor_sysctl_handler(struct ctl_table *table, int write,
 	void __user *buffer, size_t *length, loff_t *ppos)
 {
@@ -7497,8 +7655,8 @@ static void setup_min_unmapped_ratio(void)
 		pgdat->min_unmapped_pages = 0;
 
 	for_each_zone(zone)
-		zone->zone_pgdat->min_unmapped_pages += (zone->managed_pages *
-				sysctl_min_unmapped_ratio) / 100;
+		zone->zone_pgdat->min_unmapped_pages += (zone_managed_pages(zone) *
+						         sysctl_min_unmapped_ratio) / 100;
 }
 
 
@@ -7525,8 +7683,8 @@ static void setup_min_slab_ratio(void)
 		pgdat->min_slab_pages = 0;
 
 	for_each_zone(zone)
-		zone->zone_pgdat->min_slab_pages += (zone->managed_pages *
-				sysctl_min_slab_ratio) / 100;
+		zone->zone_pgdat->min_slab_pages += (zone_managed_pages(zone) *
+						     sysctl_min_slab_ratio) / 100;
 }
 
 int sysctl_min_slab_ratio_sysctl_handler(struct ctl_table *table, int write,
@@ -7766,8 +7924,7 @@ void *__init alloc_large_system_hash(const char *tablename,
  * race condition. So you can't expect this function should be exact.
  */
 bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
-			 int migratetype,
-			 bool skip_hwpoisoned_pages)
+			 int migratetype, int flags)
 {
 	unsigned long pfn, iter, found;
 
@@ -7841,7 +7998,7 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
 		 * The HWPoisoned page may be not in buddy system, and
 		 * page_count() is not 0.
 		 */
-		if (skip_hwpoisoned_pages && PageHWPoison(page))
+		if ((flags & SKIP_HWPOISON) && PageHWPoison(page))
 			continue;
 
 		if (__PageMovable(page))
@@ -7868,6 +8025,8 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
 	return false;
 unmovable:
 	WARN_ON_ONCE(zone_idx(zone) == ZONE_MOVABLE);
+	if (flags & REPORT_FAILURE)
+		dump_page(pfn_to_page(pfn+iter), "unmovable page");
 	return true;
 }
 
@@ -7994,8 +8153,7 @@ int alloc_contig_range(unsigned long start, unsigned long end,
 	 */
 
 	ret = start_isolate_page_range(pfn_max_align_down(start),
-				       pfn_max_align_up(end), migratetype,
-				       false);
+				       pfn_max_align_up(end), migratetype, 0);
 	if (ret)
 		return ret;