Index: linux-2.6.19-rc5-mm2/mm/swap_state.c
===================================================================
--- linux-2.6.19-rc5-mm2.orig/mm/swap_state.c	2006-11-15 16:48:13.000000000 -0600
+++ linux-2.6.19-rc5-mm2/mm/swap_state.c	2006-11-20 16:56:19.315797131 -0600
@@ -151,6 +151,9 @@ int add_to_swap(struct page * page, gfp_
 	swp_entry_t entry;
 	int err;
 
+	printk(KERN_CRIT "add_to_swap(%p, %x)\n", page, gfp_mask);
+	dump_stack();
+
 	/* Swap prefetching is delayed if we're swapping pages */
 	delay_swap_prefetch();