Index: linux-2.6.20-mm2/mm/slub.c
===================================================================
--- linux-2.6.20-mm2.orig/mm/slub.c	2007-02-21 21:17:27.000000000 -0800
+++ linux-2.6.20-mm2/mm/slub.c	2007-02-21 21:21:53.000000000 -0800
@@ -843,10 +843,10 @@
 	return order;
 }
 
-static unsigned long calculate_alignment(struct kmem_cache *s,
+static unsigned long calculate_alignment(unsigned long flags,
 		unsigned long align)
 {
-	if (s->flags & (SLAB_MUST_HWCACHE_ALIGN|SLAB_HWCACHE_ALIGN))
+	if (flags & (SLAB_MUST_HWCACHE_ALIGN|SLAB_HWCACHE_ALIGN))
 		return L1_CACHE_BYTES;
 
 	if (align < ARCH_SLAB_MINALIGN)
@@ -864,6 +864,9 @@
 	int cpu;
 	int node;
 
+	printk(KERN_ERR "kmem_cache_open(%p, %s, %ld, %ld, %lx, %p, %p)\n",
+			s, name, size, align, flags, ctor, dtor);
+
 	BUG_ON(flags & SLUB_UNIMPLEMENTED);
 	memset(s, 0, sizeof(struct kmem_cache));
 	for_each_node(node)
@@ -903,9 +906,11 @@
 		*/
 		s->offset = size / sizeof(void *);
 		size += sizeof(void *);
+		printk("%s: free pointer moved to offset %d size=%ld\n",
+			s->name, s->offset, size);
 	}
 
-	align = calculate_alignment(s, align);
+	align = calculate_alignment(flags, align);
 
 	size = ALIGN(size, align);
 	s->size = size;
@@ -919,6 +924,7 @@
 	if (!s->objects)
 		goto error;
 
+	printk(KERN_ERR "%s objects=%d order=%d size=%d\n", s->name,s->objects, s->order, s->size);
 	register_slab(s);
 	return 1;
 
@@ -1356,7 +1362,7 @@
 #ifdef SLUB_MERGE
 	if (!ctor && !dtor && !(flags & SLUB_NO_MERGE) &&
 			align <= ARCH_SLAB_MINALIGN) {
-		int sz = ALIGN(size, calculate_alignment(s, align));
+		int sz = ALIGN(size, calculate_alignment(flags, align));
 
 		/* Find the kmalloc slab that would be used for this size */
 		s = __kmalloc_slab(sz);
@@ -1374,8 +1380,10 @@
 				" into kmalloc array size %d\n",
 				name, (int)size, (int)s->size);
 			return kmem_cache_dup(s);
-		}
-	}
+		} else
+			printk(KERN_ERR "%s: not merged because of size mismatch size is %d.General cache size is %d\n", name, sz, s->size);
+	} else
+		printk(KERN_ERR "%s not merged because of flags,ctor,dtor or align\n", name);
 #endif
 
 	s = kmalloc(sizeof(struct kmem_cache), GFP_KERNEL);