Index: linux-2.6.21-rc5-mm4/mm/slub.c
===================================================================
--- linux-2.6.21-rc5-mm4.orig/mm/slub.c	2007-04-06 10:33:13.000000000 -0700
+++ linux-2.6.21-rc5-mm4/mm/slub.c	2007-04-06 10:36:45.000000000 -0700
@@ -572,6 +572,28 @@ static int on_freelist(struct kmem_cache
 	return 0;
 }
 
+/*
+ * Tracking of fully allocated slabs for debugging
+ */
+static void add_full(struct kmem_cache *s, struct page *page)
+{
+	struct kmem_cache_node *n = get_node(s, page_to_nid(page));
+
+	spin_lock(&n->list_lock);
+	list_add(&page->lru, &n->full);
+	spin_unlock(&n->list_lock);
+}
+
+static void remove_full(struct kmem_cache *s,
+						struct page *page)
+{
+	struct kmem_cache_node *n = get_node(s, page_to_nid(page));
+
+	spin_lock(&n->list_lock);
+	list_del(&page->lru);
+	spin_unlock(&n->list_lock);
+}
+
 static int alloc_object_checks(struct kmem_cache *s, struct page *page,
 							void *object)
 {
@@ -862,7 +884,7 @@ static void add_partial(struct kmem_cach
 
 	spin_lock(&n->list_lock);
 	n->nr_partial++;
-	list_add_tail(&page->lru, &n->partial);
+	list_add(&page->lru, &n->partial);
 	spin_unlock(&n->list_lock);
 }
 
@@ -1187,6 +1209,9 @@ debug:
 		goto another_slab;
 	if (s->flags & SLAB_STORE_USER)
 		set_tracking(s, object, 0);
+	if (get_freepointer(s, object))
+		/* Slab will be full */
+		add_full(s, page);
 	goto have_object;
 }
 
@@ -1264,6 +1289,9 @@ slab_empty:
 debug:
 	if (free_object_checks(s, page, x))
 		goto checks_ok;
+	/* Debugging means we keep lists of full slabs */
+	if (!page->freelist)
+		remove_full(s, page);
 	goto out_unlock;
 }
 
@@ -1384,6 +1412,7 @@ static void init_kmem_cache_node(struct 
 	atomic_long_set(&n->nr_slabs, 0);
 	spin_lock_init(&n->list_lock);
 	INIT_LIST_HEAD(&n->partial);
+	INIT_LIST_HEAD(&n->full);
 }
 
 static void free_kmem_cache_nodes(struct kmem_cache *s)
Index: linux-2.6.21-rc5-mm4/include/linux/slub_def.h
===================================================================
--- linux-2.6.21-rc5-mm4.orig/include/linux/slub_def.h	2007-04-03 23:48:34.000000000 -0700
+++ linux-2.6.21-rc5-mm4/include/linux/slub_def.h	2007-04-06 10:36:45.000000000 -0700
@@ -16,6 +16,7 @@ struct kmem_cache_node {
 	unsigned long nr_partial;
 	atomic_long_t nr_slabs;
 	struct list_head partial;
+	struct list_head full;
 };
 
 /*