Index: linux-2.6.21-rc4/mm/slub.c
===================================================================
--- linux-2.6.21-rc4.orig/mm/slub.c	2007-03-21 21:59:54.000000000 -0700
+++ linux-2.6.21-rc4/mm/slub.c	2007-03-21 22:39:12.000000000 -0700
@@ -20,6 +20,7 @@
 #include <linux/mempolicy.h>
 #include <linux/ctype.h>
 #include <linux/kallsyms.h>
+#include <asm/kdebug.h>
 
 /*
  * Lock order:
@@ -109,10 +110,12 @@
 static void sysfs_slab_add(struct kmem_cache *);
 static void sysfs_slab_alias(struct kmem_cache *, const char *);
 static void sysfs_slab_remove(struct kmem_cache *);
+static void setup_slab_die(void);
 #else
 static void sysfs_slab_add(struct kmem_cache *) {}
 static void sysfs_slab_alias(struct kmem_cache *, const char *) {}
 static void sysfs_slab_remove(struct kmem_cache *) {}
+static void setup_slab_die(void) {}
 #endif
 
 /********************************************************************
@@ -314,7 +317,7 @@
 
 	if (s->flags & __OBJECT_POISON) {
 		memset(p, POISON_FREE, s->objsize - 1);
-		p[s->objsize -1] = POISON_END;
+		p[s->objsize - 1] = POISON_END;
 	}
 
 	if (s->flags & SLAB_RED_ZONE)
@@ -2052,6 +2055,8 @@
 	kmem_size = offsetof(struct kmem_cache, cpu_slab)
 		 + nr_cpu_ids * sizeof(struct page *);
 
+	setup_slab_die();
+
 	printk(KERN_INFO "SLUB V6: General Slabs=%ld, HW alignment=%d, "
 		"Processors=%d, Nodes=%d\n",
 		(unsigned long)KMALLOC_SHIFT_HIGH + KMALLOC_EXTRAS + 1
@@ -2319,6 +2324,67 @@
 
 #ifdef CONFIG_SYSFS
 
+/*
+ * Validation of slabs that are on the lists. The caller must
+ * provide synchronization if necessary.
+ */
+static void validate_slab(struct kmem_cache *s, struct page *page)
+{
+	void *p;
+	void *addr = page_address(page);
+	unsigned long map[BITS_TO_LONGS(s->objects)];
+
+	if (!check_slab(s, page) ||
+			!on_freelist(s, page, NULL))
+		return;
+
+	printk(KERN_ERR "Detail check on slab %p\n", page);
+	/* Now we know that a valid freelist exists */
+	bitmap_zero(map, s->objects);
+
+	for(p = page->freelist; p; p = get_freepointer(s, p)) {
+		set_bit((p - addr) / s->size, map);
+		check_object(s, page, p, 0);
+	}
+
+	for(p = addr; p < addr + s->objects * s->size; p += s->size)
+		if (!test_bit((p - addr) / s->size, map))
+			check_object(s, page, p, 1);
+}
+
+static void validate_slab_cache(struct kmem_cache *s)
+{
+	int node;
+
+	for_each_online_node(node) {
+		struct kmem_cache_node *n = get_node(s, node);
+		struct page *page;
+
+		printk(KERN_ERR "Die: validating partial pages for slab %s\n", s->name);
+		list_for_each_entry(page, &n->partial, lru)
+			validate_slab(s, page);
+	}
+}
+
+static int slab_die_call(struct notifier_block *self,
+		unsigned long val, void *data)
+{
+	struct kmem_cache *s;
+
+	list_for_each_entry(s, &slab_caches, list)
+		validate_slab_cache(s);
+
+	return NOTIFY_OK;
+}
+
+struct notifier_block slab_die_notifier = {
+	.notifier_call = slab_die_call,
+};
+
+static void __init setup_slab_die(void)
+{
+	register_die_notifier(&slab_die_notifier);
+}
 
 /* From mm */
 int sprint_symbol(char *buffer, unsigned long address)