Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[linux-2.6-omap-h63xx.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d315e1127dc91891980d180618d78ca51277aae7..12376ae3f7334e124d488b1d7bc3d291d64e9be1 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -27,6 +27,7 @@
 #include <linux/pagevec.h>
 #include <linux/blkdev.h>
 #include <linux/slab.h>
+#include <linux/oom.h>
 #include <linux/notifier.h>
 #include <linux/topology.h>
 #include <linux/sysctl.h>
@@ -122,7 +123,7 @@ static unsigned long __meminitdata dma_reserve;
 
 #ifdef CONFIG_ARCH_POPULATES_NODE_MAP
   /*
-   * MAX_ACTIVE_REGIONS determines the maxmimum number of distinct
+   * MAX_ACTIVE_REGIONS determines the maximum number of distinct
    * ranges of memory (RAM) that may be registered with add_active_range().
    * Ranges passed to add_active_range() will be merged if possible
    * so the number of times add_active_range() can be called is
@@ -489,7 +490,7 @@ static void free_pages_bulk(struct zone *zone, int count,
                                        struct list_head *list, int order)
 {
        spin_lock(&zone->lock);
-       zone->all_unreclaimable = 0;
+       zone_clear_flag(zone, ZONE_ALL_UNRECLAIMABLE);
        zone->pages_scanned = 0;
        while (count--) {
                struct page *page;
@@ -506,7 +507,7 @@ static void free_pages_bulk(struct zone *zone, int count,
 static void free_one_page(struct zone *zone, struct page *page, int order)
 {
        spin_lock(&zone->lock);
-       zone->all_unreclaimable = 0;
+       zone_clear_flag(zone, ZONE_ALL_UNRECLAIMABLE);
        zone->pages_scanned = 0;
        __free_one_page(page, zone, order);
        spin_unlock(&zone->lock);
@@ -748,23 +749,6 @@ int move_freepages_block(struct zone *zone, struct page *page, int migratetype)
        return move_freepages(zone, start_page, end_page, migratetype);
 }
 
-/* Return the page with the lowest PFN in the list */
-static struct page *min_page(struct list_head *list)
-{
-       unsigned long min_pfn = -1UL;
-       struct page *min_page = NULL, *page;;
-
-       list_for_each_entry(page, list, lru) {
-               unsigned long pfn = page_to_pfn(page);
-               if (pfn < min_pfn) {
-                       min_pfn = pfn;
-                       min_page = page;
-               }
-       }
-
-       return min_page;
-}
-
 /* Remove an element from the buddy allocator from the fallback list */
 static struct page *__rmqueue_fallback(struct zone *zone, int order,
                                                int start_migratetype)
@@ -788,11 +772,8 @@ static struct page *__rmqueue_fallback(struct zone *zone, int order,
                        if (list_empty(&area->free_list[migratetype]))
                                continue;
 
-                       /* Bias kernel allocations towards low pfns */
                        page = list_entry(area->free_list[migratetype].next,
                                        struct page, lru);
-                       if (unlikely(start_migratetype != MIGRATE_MOVABLE))
-                               page = min_page(&area->free_list[migratetype]);
                        area->nr_free--;
 
                        /*
@@ -1259,7 +1240,7 @@ int zone_watermark_ok(struct zone *z, int order, unsigned long mark,
  * skip over zones that are not allowed by the cpuset, or that have
  * been recently (in last second) found to be nearly full.  See further
  * comments in mmzone.h.  Reduces cache footprint of zonelist scans
- * that have to skip over alot of full or unallowed zones.
+ * that have to skip over a lot of full or unallowed zones.
  *
  * If the zonelist cache is present in the passed in zonelist, then
  * returns a pointer to the allowed node mask (either the current
@@ -1586,6 +1567,11 @@ nofail_alloc:
                if (page)
                        goto got_pg;
        } else if ((gfp_mask & __GFP_FS) && !(gfp_mask & __GFP_NORETRY)) {
+               if (!try_set_zone_oom(zonelist)) {
+                       schedule_timeout_uninterruptible(1);
+                       goto restart;
+               }
+
                /*
                 * Go through the zonelist yet one more time, keep
                 * very high watermark here, this is only to catch
@@ -1594,14 +1580,19 @@ nofail_alloc:
                 */
                page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, order,
                                zonelist, ALLOC_WMARK_HIGH|ALLOC_CPUSET);
-               if (page)
+               if (page) {
+                       clear_zonelist_oom(zonelist);
                        goto got_pg;
+               }
 
                /* The OOM killer will not help higher order allocs so fail */
-               if (order > PAGE_ALLOC_COSTLY_ORDER)
+               if (order > PAGE_ALLOC_COSTLY_ORDER) {
+                       clear_zonelist_oom(zonelist);
                        goto nopage;
+               }
 
                out_of_memory(zonelist, gfp_mask, order);
+               clear_zonelist_oom(zonelist);
                goto restart;
        }
 
@@ -1850,7 +1841,7 @@ void show_free_areas(void)
                        K(zone_page_state(zone, NR_INACTIVE)),
                        K(zone->present_pages),
                        zone->pages_scanned,
-                       (zone->all_unreclaimable ? "yes" : "no")
+                       (zone_is_all_unreclaimable(zone) ? "yes" : "no")
                        );
                printk("lowmem_reserve[]:");
                for (i = 0; i < MAX_NR_ZONES; i++)
@@ -2347,7 +2338,7 @@ void build_all_zonelists(void)
                __build_all_zonelists(NULL);
                cpuset_init_current_mems_allowed();
        } else {
-               /* we have to stop all cpus to guaranntee there is no user
+               /* we have to stop all cpus to guarantee there is no user
                   of zonelist */
                stop_machine_run(__build_all_zonelists, NULL, NR_CPUS);
                /* cpuset refresh routine should be here */
@@ -2853,7 +2844,7 @@ static int __meminit first_active_region_index_in_nid(int nid)
 
 /*
  * Basic iterator support. Return the next active range of PFNs for a node
- * Note: nid == MAX_NUMNODES returns next region regardles of node
+ * Note: nid == MAX_NUMNODES returns next region regardless of node
  */
 static int __meminit next_active_region_index_in_nid(int index, int nid)
 {
@@ -3371,7 +3362,7 @@ static void __meminit free_area_init_core(struct pglist_data *pgdat,
                zone->nr_scan_active = 0;
                zone->nr_scan_inactive = 0;
                zap_zone_vm_stats(zone);
-               atomic_set(&zone->reclaim_in_progress, 0);
+               zone->flags = 0;
                if (!size)
                        continue;