netns xfrm: fix "ip xfrm state|policy count" misreport

[safe/jmp/linux-2.6] / mm / vmscan.c

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 63bd521..c26986c 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -71,12 +71,6 @@ struct scan_control {
        /* Can pages be swapped as part of reclaim? */
        int may_swap;
 
-       /* This context's SWAP_CLUSTER_MAX. If freeing memory for
-        * suspend, we effectively ignore SWAP_CLUSTER_MAX.
-        * In this context, it doesn't matter that we scan the
-        * whole list at once. */
-       int swap_cluster_max;
-
        int swappiness;
 
        int all_unreclaimable;
@@ -1137,7 +1131,7 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
                unsigned long nr_anon;
                unsigned long nr_file;
 
-               nr_taken = sc->isolate_pages(sc->swap_cluster_max,
+               nr_taken = sc->isolate_pages(SWAP_CLUSTER_MAX,
                             &page_list, &nr_scan, sc->order, mode,
                                zone, sc->mem_cgroup, 0, file);
 
@@ -1171,10 +1165,8 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
                __mod_zone_page_state(zone, NR_ISOLATED_ANON, nr_anon);
                __mod_zone_page_state(zone, NR_ISOLATED_FILE, nr_file);
 
-               reclaim_stat->recent_scanned[0] += count[LRU_INACTIVE_ANON];
-               reclaim_stat->recent_scanned[0] += count[LRU_ACTIVE_ANON];
-               reclaim_stat->recent_scanned[1] += count[LRU_INACTIVE_FILE];
-               reclaim_stat->recent_scanned[1] += count[LRU_ACTIVE_FILE];
+               reclaim_stat->recent_scanned[0] += nr_anon;
+               reclaim_stat->recent_scanned[1] += nr_file;
 
                spin_unlock_irq(&zone->lru_lock);
 
@@ -1469,20 +1461,26 @@ static int inactive_file_is_low(struct zone *zone, struct scan_control *sc)
        return low;
 }
 
+static int inactive_list_is_low(struct zone *zone, struct scan_control *sc,
+                               int file)
+{
+       if (file)
+               return inactive_file_is_low(zone, sc);
+       else
+               return inactive_anon_is_low(zone, sc);
+}
+
 static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
        struct zone *zone, struct scan_control *sc, int priority)
 {
        int file = is_file_lru(lru);
 
-       if (lru == LRU_ACTIVE_FILE && inactive_file_is_low(zone, sc)) {
-               shrink_active_list(nr_to_scan, zone, sc, priority, file);
+       if (is_active_lru(lru)) {
+               if (inactive_list_is_low(zone, sc, file))
+                   shrink_active_list(nr_to_scan, zone, sc, priority, file);
                return 0;
        }
 
-       if (lru == LRU_ACTIVE_ANON && inactive_anon_is_low(zone, sc)) {
-               shrink_active_list(nr_to_scan, zone, sc, priority, file);
-               return 0;
-       }
        return shrink_inactive_list(nr_to_scan, zone, sc, priority, file);
 }
 
@@ -1572,15 +1570,14 @@ static void get_scan_ratio(struct zone *zone, struct scan_control *sc,
  * until we collected @swap_cluster_max pages to scan.
  */
 static unsigned long nr_scan_try_batch(unsigned long nr_to_scan,
-                                      unsigned long *nr_saved_scan,
-                                      unsigned long swap_cluster_max)
+                                      unsigned long *nr_saved_scan)
 {
        unsigned long nr;
 
        *nr_saved_scan += nr_to_scan;
        nr = *nr_saved_scan;
 
-       if (nr >= swap_cluster_max)
+       if (nr >= SWAP_CLUSTER_MAX)
                *nr_saved_scan = 0;
        else
                nr = 0;
@@ -1599,7 +1596,6 @@ static void shrink_zone(int priority, struct zone *zone,
        unsigned long percent[2];       /* anon @ 0; file @ 1 */
        enum lru_list l;
        unsigned long nr_reclaimed = sc->nr_reclaimed;
-       unsigned long swap_cluster_max = sc->swap_cluster_max;
        unsigned long nr_to_reclaim = sc->nr_to_reclaim;
        struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
        int noswap = 0;
@@ -1622,15 +1618,15 @@ static void shrink_zone(int priority, struct zone *zone,
                        scan = (scan * percent[file]) / 100;
                }
                nr[l] = nr_scan_try_batch(scan,
-                                         &reclaim_stat->nr_saved_scan[l],
-                                         swap_cluster_max);
+                                         &reclaim_stat->nr_saved_scan[l]);
        }
 
        while (nr[LRU_INACTIVE_ANON] || nr[LRU_ACTIVE_FILE] ||
                                        nr[LRU_INACTIVE_FILE]) {
                for_each_evictable_lru(l) {
                        if (nr[l]) {
-                               nr_to_scan = min(nr[l], swap_cluster_max);
+                               nr_to_scan = min_t(unsigned long,
+                                                  nr[l], SWAP_CLUSTER_MAX);
                                nr[l] -= nr_to_scan;
 
                                nr_reclaimed += shrink_list(l, nr_to_scan,
@@ -1645,7 +1641,7 @@ static void shrink_zone(int priority, struct zone *zone,
                 * with multiple processes reclaiming pages, the total
                 * freeing target can get unreasonably large.
                 */
-               if (nr_reclaimed > nr_to_reclaim && priority < DEF_PRIORITY)
+               if (nr_reclaimed >= nr_to_reclaim && priority < DEF_PRIORITY)
                        break;
        }
 
@@ -1838,7 +1834,6 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
        struct scan_control sc = {
                .gfp_mask = gfp_mask,
                .may_writepage = !laptop_mode,
-               .swap_cluster_max = SWAP_CLUSTER_MAX,
                .nr_to_reclaim = SWAP_CLUSTER_MAX,
                .may_unmap = 1,
                .may_swap = 1,
@@ -1863,7 +1858,6 @@ unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
                .may_writepage = !laptop_mode,
                .may_unmap = 1,
                .may_swap = !noswap,
-               .swap_cluster_max = SWAP_CLUSTER_MAX,
                .swappiness = swappiness,
                .order = 0,
                .mem_cgroup = mem,
@@ -1897,7 +1891,6 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
                .may_writepage = !laptop_mode,
                .may_unmap = 1,
                .may_swap = !noswap,
-               .swap_cluster_max = SWAP_CLUSTER_MAX,
                .nr_to_reclaim = SWAP_CLUSTER_MAX,
                .swappiness = swappiness,
                .order = 0,
@@ -1929,6 +1922,9 @@ static int sleeping_prematurely(pg_data_t *pgdat, int order, long remaining)
                if (!populated_zone(zone))
                        continue;
 
+               if (zone_is_all_unreclaimable(zone))
+                       continue;
+
                if (!zone_watermark_ok(zone, order, high_wmark_pages(zone),
                                                                0, 0))
                        return 1;
@@ -1969,7 +1965,6 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order)
                .gfp_mask = GFP_KERNEL,
                .may_unmap = 1,
                .may_swap = 1,
-               .swap_cluster_max = SWAP_CLUSTER_MAX,
                /*
                 * kswapd doesn't want to be bailed out while reclaim. because
                 * we want to put equal scanning pressure on each zone.
@@ -2354,7 +2349,6 @@ unsigned long shrink_all_memory(unsigned long nr_to_reclaim)
                .may_swap = 1,
                .may_unmap = 1,
                .may_writepage = 1,
-               .swap_cluster_max = SWAP_CLUSTER_MAX,
                .nr_to_reclaim = nr_to_reclaim,
                .hibernation_mode = 1,
                .swappiness = vm_swappiness,
@@ -2539,8 +2533,6 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
                .may_writepage = !!(zone_reclaim_mode & RECLAIM_WRITE),
                .may_unmap = !!(zone_reclaim_mode & RECLAIM_SWAP),
                .may_swap = 1,
-               .swap_cluster_max = max_t(unsigned long, nr_pages,
-                                      SWAP_CLUSTER_MAX),
                .nr_to_reclaim = max_t(unsigned long, nr_pages,
                                       SWAP_CLUSTER_MAX),
                .gfp_mask = gfp_mask,