mm: workingset: add vmstat counter for shadow nodes
[muen/linux.git] / mm / workingset.c
index 5a72c9d5e195aac81db295a39d08a45ca796d69a..7e6ef312cea598c3308a7ad10b26861a40e2af28 100644 (file)
@@ -377,12 +377,20 @@ void workingset_update_node(struct radix_tree_node *node)
         * already where they should be. The list_empty() test is safe
         * as node->private_list is protected by the i_pages lock.
         */
+       VM_WARN_ON_ONCE(!irqs_disabled());  /* For __inc_lruvec_page_state */
+
        if (node->count && node->count == node->exceptional) {
-               if (list_empty(&node->private_list))
+               if (list_empty(&node->private_list)) {
                        list_lru_add(&shadow_nodes, &node->private_list);
+                       __inc_lruvec_page_state(virt_to_page(node),
+                                               WORKINGSET_NODES);
+               }
        } else {
-               if (!list_empty(&node->private_list))
+               if (!list_empty(&node->private_list)) {
                        list_lru_del(&shadow_nodes, &node->private_list);
+                       __dec_lruvec_page_state(virt_to_page(node),
+                                               WORKINGSET_NODES);
+               }
        }
 }
 
@@ -473,6 +481,8 @@ static enum lru_status shadow_lru_isolate(struct list_head *item,
        }
 
        list_lru_isolate(lru, item);
+       __dec_lruvec_page_state(virt_to_page(node), WORKINGSET_NODES);
+
        spin_unlock(lru_lock);
 
        /*