[PATCH] ixgb: correct rx_dropped counting

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

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 7da8469..0ea71e8 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -822,6 +822,8 @@ shrink_zone(struct zone *zone, struct scan_control *sc)
        unsigned long nr_active;
        unsigned long nr_inactive;
 
+       atomic_inc(&zone->reclaim_in_progress);
+
        /*
         * Add one to `nr_to_scan' just to make sure that the kernel will
         * slowly sift through the active list.
@@ -861,6 +863,8 @@ shrink_zone(struct zone *zone, struct scan_control *sc)
        }
 
        throttle_vm_writeout();
+
+       atomic_dec(&zone->reclaim_in_progress);
 }
 
 /*
@@ -890,7 +894,7 @@ shrink_caches(struct zone **zones, struct scan_control *sc)
                if (zone->present_pages == 0)
                        continue;
 
-               if (!cpuset_zone_allowed(zone))
+               if (!cpuset_zone_allowed(zone, __GFP_HARDWALL))
                        continue;
 
                zone->temp_priority = sc->priority;
@@ -917,8 +921,7 @@ shrink_caches(struct zone **zones, struct scan_control *sc)
  * holds filesystem locks which prevent writeout this might not work, and the
  * allocation attempt will fail.
  */
-int try_to_free_pages(struct zone **zones,
-               unsigned int gfp_mask, unsigned int order)
+int try_to_free_pages(struct zone **zones, unsigned int gfp_mask)
 {
        int priority;
        int ret = 0;
@@ -937,7 +940,7 @@ int try_to_free_pages(struct zone **zones,
        for (i = 0; zones[i] != NULL; i++) {
                struct zone *zone = zones[i];
 
-               if (!cpuset_zone_allowed(zone))
+               if (!cpuset_zone_allowed(zone, __GFP_HARDWALL))
                        continue;
 
                zone->temp_priority = DEF_PRIORITY;
@@ -971,7 +974,7 @@ int try_to_free_pages(struct zone **zones,
                 * writeout.  So in laptop mode, write out the whole world.
                 */
                if (total_scanned > sc.swap_cluster_max + sc.swap_cluster_max/2) {
-                       wakeup_bdflush(laptop_mode ? 0 : total_scanned);
+                       wakeup_pdflush(laptop_mode ? 0 : total_scanned);
                        sc.may_writepage = 1;
                }
 
@@ -983,7 +986,7 @@ out:
        for (i = 0; zones[i] != 0; i++) {
                struct zone *zone = zones[i];
 
-               if (!cpuset_zone_allowed(zone))
+               if (!cpuset_zone_allowed(zone, __GFP_HARDWALL))
                        continue;
 
                zone->prev_priority = zone->temp_priority;
@@ -1111,7 +1114,9 @@ scan:
                        sc.nr_reclaimed = 0;
                        sc.priority = priority;
                        sc.swap_cluster_max = nr_pages? nr_pages : SWAP_CLUSTER_MAX;
+                       atomic_inc(&zone->reclaim_in_progress);
                        shrink_zone(zone, &sc);
+                       atomic_dec(&zone->reclaim_in_progress);
                        reclaim_state->reclaimed_slab = 0;
                        nr_slab = shrink_slab(sc.nr_scanned, GFP_KERNEL,
                                                lru_pages);
@@ -1213,8 +1218,8 @@ static int kswapd(void *p)
        order = 0;
        for ( ; ; ) {
                unsigned long new_order;
-               if (current->flags & PF_FREEZE)
-                       refrigerator(PF_FREEZE);
+
+               try_to_freeze();
 
                prepare_to_wait(&pgdat->kswapd_wait, &wait, TASK_INTERRUPTIBLE);
                new_order = pgdat->kswapd_max_order;
@@ -1251,11 +1256,11 @@ void wakeup_kswapd(struct zone *zone, int order)
                return;
        if (pgdat->kswapd_max_order < order)
                pgdat->kswapd_max_order = order;
-       if (!cpuset_zone_allowed(zone))
+       if (!cpuset_zone_allowed(zone, __GFP_HARDWALL))
                return;
-       if (!waitqueue_active(&zone->zone_pgdat->kswapd_wait))
+       if (!waitqueue_active(&pgdat->kswapd_wait))
                return;
-       wake_up_interruptible(&zone->zone_pgdat->kswapd_wait);
+       wake_up_interruptible(&pgdat->kswapd_wait);
 }
 
 #ifdef CONFIG_PM
@@ -1354,9 +1359,14 @@ int zone_reclaim(struct zone *zone, unsigned int gfp_mask, unsigned int order)
        else
                sc.swap_cluster_max = SWAP_CLUSTER_MAX;
 
+       /* Don't reclaim the zone if there are other reclaimers active */
+       if (atomic_read(&zone->reclaim_in_progress) > 0)
+               goto out;
+
        shrink_zone(zone, &sc);
        total_reclaimed = sc.nr_reclaimed;
 
+ out:
        return total_reclaimed;
 }
 
@@ -1366,6 +1376,9 @@ asmlinkage long sys_set_zone_reclaim(unsigned int node, unsigned int zone,
        struct zone *z;
        int i;
 
+       if (!capable(CAP_SYS_ADMIN))
+               return -EACCES;
+
        if (node >= MAX_NUMNODES || !node_online(node))
                return -EINVAL;