Index: linux-2.6.18-rc1/mm/slab.c
===================================================================
--- linux-2.6.18-rc1.orig/mm/slab.c	2006-07-11 22:27:03.604860712 -0700
+++ linux-2.6.18-rc1/mm/slab.c	2006-07-11 23:02:44.201977426 -0700
@@ -298,6 +298,7 @@ struct kmem_list3 {
 	struct array_cache **alien;	/* on other nodes */
 	unsigned long next_reap;	/* updated without locking */
 	int free_touched;		/* updated without locking */
+	struct kmem_cache *cache;	/* The cache that we belong to */
 };
 
 /*
@@ -1116,6 +1117,7 @@ static int __devinit cpuup_callback(stru
 				 * go.  cache_chain_mutex is sufficient
 				 * protection here.
 				 */
+				l3->cache = cachep;
 				cachep->nodelists[node] = l3;
 			}
 
@@ -1925,6 +1927,7 @@ static void setup_cpu_cache(struct kmem_
 						GFP_KERNEL, node);
 				BUG_ON(!cachep->nodelists[node]);
 				kmem_list3_init(cachep->nodelists[node]);
+				cachep->nodelists[node]->cache = cachep;
 			}
 		}
 	}
@@ -3491,7 +3494,7 @@ const char *kmem_cache_name(struct kmem_
 EXPORT_SYMBOL_GPL(kmem_cache_name);
 
 /*
- * This initializes kmem_list3 or resizes varioius caches for all nodes.
+ * This initializes kmem_list3 or resizes various caches for all nodes.
  */
 static int alloc_kmemlist(struct kmem_cache *cachep)
 {
@@ -3544,6 +3547,7 @@ static int alloc_kmemlist(struct kmem_ca
 		}
 
 		kmem_list3_init(l3);
+		l3->cache = cachep;
 		l3->next_reap = jiffies + REAPTIMEOUT_LIST3 +
 				((unsigned long)cachep) % REAPTIMEOUT_LIST3;
 		l3->shared = new_shared;