---
 mm/slub.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c	2007-08-08 23:22:15.000000000 -0700
+++ linux-2.6/mm/slub.c	2007-08-08 23:38:58.000000000 -0700
@@ -2549,8 +2549,10 @@ int kmem_cache_isolate_slab(struct page 
 	 * This is necessary to make sure that the page does not vanish
 	 * from under us before we are able to check the result.
 	 */
-	if (!get_page_unless_zero(page))
+	if (!get_page_unless_zero(page)) {
+		printk(KERN_ERR "isolate %p zero ref\n", page);
 		return rc;
+	}
 
 	local_irq_save(flags);
 	slab_lock(page);
@@ -2564,6 +2566,8 @@ int kmem_cache_isolate_slab(struct page 
 	if (!PageSlab(page) || SlabFrozen(page) || !page->inuse) {
 		slab_unlock(page);
 		put_page(page);
+		printk(KERN_ERR "isolate faillock %p flags=%lx %s\n",
+			page, page->flags, PageSlab(page)?page->slab->name:"--");
 		goto out;
 	}