---
 mm/page_alloc.c |    3 +++
 mm/slub.c       |    1 +
 2 files changed, 4 insertions(+)

Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c	2008-03-17 11:09:34.549410711 -0700
+++ linux-2.6/mm/page_alloc.c	2008-03-17 11:24:57.248332362 -0700
@@ -1477,6 +1477,9 @@ __alloc_pages(gfp_t gfp_mask, unsigned i
 	if (should_fail_alloc_page(gfp_mask, order))
 		return NULL;
 
+	/* 50% of order 3 allocs fail */
+	if (order == 3 && system_state == SYSTEM_RUNNING && (jiffies % 2))
+		return NULL;
 restart:
 	z = zonelist->zones;  /* the list of zones suitable for gfp_mask */
 
Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c	2008-03-17 11:14:17.567547824 -0700
+++ linux-2.6/mm/slub.c	2008-03-17 11:18:02.777891812 -0700
@@ -1540,6 +1540,7 @@ new_slab:
 				(s->flags & __PAGE_ALLOC_FALLBACK)) {
 		if (gfpflags & __GFP_WAIT)
 			local_irq_enable();
+		printk("SLUB: Fallback for %s\n", s->name);
 		object = kmalloc_large(s->objsize, gfpflags);
 		if (gfpflags & __GFP_WAIT)
 			local_irq_disable();