1 files changed, 28 insertions, 14 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 97d6827c7d66..253a450c400d 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -39,6 +39,7 @@
 #include <linux/mempolicy.h>
 
 #include <asm/tlbflush.h>
+#include <asm/div64.h>
 #include "internal.h"
 
 /*
@@ -232,11 +233,13 @@ static inline void prep_zero_page(struct page *page, int order, gfp_t gfp_flags)
  * zone->lock is already acquired when we use these.
  * So, we don't need atomic page->flags operations here.
  */
-static inline unsigned long page_order(struct page *page) {
+static inline unsigned long page_order(struct page *page)
+{
         return page_private(page);
 }
 
-static inline void set_page_order(struct page *page, int order) {
+static inline void set_page_order(struct page *page, int order)
+{
         set_page_private(page, order);
         __SetPageBuddy(page);
 }
@@ -299,9 +302,9 @@ static inline int page_is_buddy(struct page *page, int order)
 
         if (PageBuddy(page) && page_order(page) == order) {
                 BUG_ON(page_count(page) != 0);
-               return 1;
+                return 1;
         }
-       return 0;
+        return 0;
 }
 
 /*
@@ -948,7 +951,7 @@ restart:
                 goto got_pg;
 
         do {
-                if (cpuset_zone_allowed(*z, gfp_mask))
+                if (cpuset_zone_allowed(*z, gfp_mask|__GFP_HARDWALL))
                         wakeup_kswapd(*z, order);
         } while (*(++z));
 
@@ -967,7 +970,8 @@ restart:
                 alloc_flags |= ALLOC_HARDER;
         if (gfp_mask & __GFP_HIGH)
                 alloc_flags |= ALLOC_HIGH;
-        alloc_flags |= ALLOC_CPUSET;
+        if (wait)
+                alloc_flags |= ALLOC_CPUSET;
 
         /*
          * Go through the zonelist again. Let __GFP_HIGH and allocations
@@ -1960,7 +1964,7 @@ static inline void free_zone_pagesets(int cpu)
         }
 }
 
-static int __cpuinit pageset_cpuup_callback(struct notifier_block *nfb,
+static int pageset_cpuup_callback(struct notifier_block *nfb,
                 unsigned long action,
                 void *hcpu)
 {
@@ -2121,14 +2125,22 @@ static void __init alloc_node_mem_map(struct pglist_data *pgdat)
 #ifdef CONFIG_FLAT_NODE_MEM_MAP
         /* ia64 gets its own node_mem_map, before this, without bootmem */
         if (!pgdat->node_mem_map) {
-                unsigned long size;
+                unsigned long size, start, end;
                 struct page *map;
 
-                size = (pgdat->node_spanned_pages + 1) * sizeof(struct page);
+                /*
+                 * The zone's endpoints aren't required to be MAX_ORDER
+                 * aligned but the node_mem_map endpoints must be in order
+                 * for the buddy allocator to function correctly.
+                 */
+                start = pgdat->node_start_pfn & ~(MAX_ORDER_NR_PAGES - 1);
+                end = pgdat->node_start_pfn + pgdat->node_spanned_pages;
+                end = ALIGN(end, MAX_ORDER_NR_PAGES);
+                size =  (end - start) * sizeof(struct page);
                 map = alloc_remap(pgdat->node_id, size);
                 if (!map)
                         map = alloc_bootmem_node(pgdat, size);
-                pgdat->node_mem_map = map;
+                pgdat->node_mem_map = map + (pgdat->node_start_pfn - start);
         }
 #ifdef CONFIG_FLATMEM
         /*
@@ -2564,9 +2576,11 @@ void setup_per_zone_pages_min(void)
         }
 
         for_each_zone(zone) {
-                unsigned long tmp;
+                u64 tmp;
+
                 spin_lock_irqsave(&zone->lru_lock, flags);
-                tmp = (pages_min * zone->present_pages) / lowmem_pages;
+                tmp = (u64)pages_min * zone->present_pages;
+                do_div(tmp, lowmem_pages);
                 if (is_highmem(zone)) {
                         /*
                          * __GFP_HIGH and PF_MEMALLOC allocations usually don't
@@ -2593,8 +2607,8 @@ void setup_per_zone_pages_min(void)
                         zone->pages_min = tmp;
                 }
 
-                zone->pages_low   = zone->pages_min + tmp / 4;
-                zone->pages_high  = zone->pages_min + tmp / 2;
+                zone->pages_low   = zone->pages_min + (tmp >> 2);
+                zone->pages_high  = zone->pages_min + (tmp >> 1);
                 spin_unlock_irqrestore(&zone->lru_lock, flags);
         }