mm: memcg: convert vmstat slab counters to bytes

[linux-2.6-microblaze.git] / include / linux / mmzone.h

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index f16306e..b79100e 100644 (file)
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -174,8 +174,8 @@ enum node_stat_item {
        NR_INACTIVE_FILE,       /*  "     "     "   "       "         */
        NR_ACTIVE_FILE,         /*  "     "     "   "       "         */
        NR_UNEVICTABLE,         /*  "     "     "   "       "         */
-       NR_SLAB_RECLAIMABLE,
-       NR_SLAB_UNRECLAIMABLE,
+       NR_SLAB_RECLAIMABLE_B,
+       NR_SLAB_UNRECLAIMABLE_B,
        NR_ISOLATED_ANON,       /* Temporary isolated pages from anon lru */
        NR_ISOLATED_FILE,       /* Temporary isolated pages from file lru */
        WORKINGSET_NODES,
@@ -213,7 +213,17 @@ enum node_stat_item {
  */
 static __always_inline bool vmstat_item_in_bytes(int idx)
 {
-       return false;
+       /*
+        * Global and per-node slab counters track slab pages.
+        * It's expected that changes are multiples of PAGE_SIZE.
+        * Internally values are stored in pages.
+        *
+        * Per-memcg and per-lruvec counters track memory, consumed
+        * by individual slab objects. These counters are actually
+        * byte-precise.
+        */
+       return (idx == NR_SLAB_RECLAIMABLE_B ||
+               idx == NR_SLAB_UNRECLAIMABLE_B);
 }
 
 /*