mm, vmscan: move LRU lists to node

[mirror_ubuntu-bionic-kernel.git] / include / linux / vmstat.h

diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index d1744aa3ab9c28a77b905dff2e9bbcd19daddbe7..fee321c98550081eda3fc0d50b6e0d39e8941528 100644 (file)
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -178,6 +178,23 @@ static inline unsigned long zone_page_state_snapshot(struct zone *zone,
        return x;
 }
 
+static inline unsigned long node_page_state_snapshot(pg_data_t *pgdat,
+                                       enum node_stat_item item)
+{
+       long x = atomic_long_read(&pgdat->vm_stat[item]);
+
+#ifdef CONFIG_SMP
+       int cpu;
+       for_each_online_cpu(cpu)
+               x += per_cpu_ptr(pgdat->per_cpu_nodestats, cpu)->vm_node_stat_diff[item];
+
+       if (x < 0)
+               x = 0;
+#endif
+       return x;
+}
+
+
 #ifdef CONFIG_NUMA
 extern unsigned long sum_zone_node_page_state(int node,
                                                enum zone_stat_item item);