Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c	2008-05-27 22:30:59.000000000 -0700
+++ linux-2.6/mm/slub.c	2008-05-27 22:34:56.000000000 -0700
@@ -2265,7 +2265,11 @@
 
 const char *kmem_cache_name(struct kmem_cache *s)
 {
-	return s->name;
+	if (s->refcount > 1)
+		/* Multiple slabs share the cache. There is no effective name */
+		return NULL;
+	else
+		return s->name;
 }
 EXPORT_SYMBOL(kmem_cache_name);