[PATCH] Show more stats in the sysrq-M output

Display number of slab, mapped and pagetable pages in the sysrq-M output.

mm/page_alloc.c

@@ -1044,13 +1044,16 @@ void show_free_areas(void)
 		K(nr_free_highpages()));
 
 	printk("Active:%lu inactive:%lu dirty:%lu writeback:%lu "
-		"unstable:%lu free:%u\n",
+		"unstable:%lu free:%u slab:%lu mapped:%lu pagetables:%lu\n",
 		active,
 		inactive,
 		ps.nr_dirty,
 		ps.nr_writeback,
 		ps.nr_unstable,
-		nr_free_pages());
+		nr_free_pages(),
+		ps.nr_slab,
+		ps.nr_mapped,
+		ps.nr_page_table_pages);
 
 	for_each_zone(zone) {
 		show_node(zone);