vmscan: all_unreclaimable() use zone->all_unreclaimable as a name

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

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 060e4c1..f6b435c 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -41,6 +41,7 @@
 #include <linux/memcontrol.h>
 #include <linux/delayacct.h>
 #include <linux/sysctl.h>
+#include <linux/oom.h>
 
 #include <asm/tlbflush.h>
 #include <asm/div64.h>
@@ -358,7 +359,7 @@ static int may_write_to_queue(struct backing_dev_info *bdi,
 static void handle_write_error(struct address_space *mapping,
                                struct page *page, int error)
 {
-       lock_page_nosync(page);
+       lock_page(page);
        if (page_mapping(page) == mapping)
                mapping_set_error(mapping, error);
        unlock_page(page);
@@ -1065,7 +1066,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
                 * surrounding the tag page.  Only take those pages of
                 * the same active state as that tag page.  We may safely
                 * round the target page pfn down to the requested order
-                * as the mem_map is guarenteed valid out to MAX_ORDER,
+                * as the mem_map is guaranteed valid out to MAX_ORDER,
                 * where that page is in a different zone we will detect
                 * it from its zone id and abort this block scan.
                 */
@@ -1988,17 +1989,12 @@ static bool zone_reclaimable(struct zone *zone)
        return zone->pages_scanned < zone_reclaimable_pages(zone) * 6;
 }
 
-/*
- * As hibernation is going on, kswapd is freezed so that it can't mark
- * the zone into all_unreclaimable. It can't handle OOM during hibernation.
- * So let's check zone's unreclaimable in direct reclaim as well as kswapd.
- */
+/* All zones in zonelist are unreclaimable? */
 static bool all_unreclaimable(struct zonelist *zonelist,
                struct scan_control *sc)
 {
        struct zoneref *z;
        struct zone *zone;
-       bool all_unreclaimable = true;
 
        for_each_zone_zonelist_nodemask(zone, z, zonelist,
                        gfp_zone(sc->gfp_mask), sc->nodemask) {
@@ -2006,13 +2002,11 @@ static bool all_unreclaimable(struct zonelist *zonelist,
                        continue;
                if (!cpuset_zone_allowed_hardwall(zone, GFP_KERNEL))
                        continue;
-               if (zone_reclaimable(zone)) {
-                       all_unreclaimable = false;
-                       break;
-               }
+               if (!zone->all_unreclaimable)
+                       return false;
        }
 
-       return all_unreclaimable;
+       return true;
 }
 
 /*
@@ -2108,6 +2102,14 @@ out:
        if (sc->nr_reclaimed)
                return sc->nr_reclaimed;
 
+       /*
+        * As hibernation is going on, kswapd is freezed so that it can't mark
+        * the zone into all_unreclaimable. Thus bypassing all_unreclaimable
+        * check.
+        */
+       if (oom_killer_disabled)
+               return 0;
+
        /* top priority shrink_zones still had more to do? don't OOM, then */
        if (scanning_global_lru(sc) && !all_unreclaimable(zonelist, sc))
                return 1;
@@ -2224,7 +2226,7 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
  *   o a 16M DMA zone that is balanced will not balance a zone on any
  *     reasonable sized machine
  *   o On all other machines, the top zone must be at least a reasonable
- *     precentage of the middle zones. For example, on 32-bit x86, highmem
+ *     percentage of the middle zones. For example, on 32-bit x86, highmem
  *     would need to be at least 256M for it to be balance a whole node.
  *     Similarly, on x86-64 the Normal zone would need to be at least 1G
  *     to balance a node on its own. These seemed like reasonable ratios.