diff -urbBd linux-2.4.21/include/linux/swap.h linux-2.4.21-1/include/linux/swap.h
--- linux-2.4.21/include/linux/swap.h	Fri Jun 13 07:51:39 2003
+++ linux-2.4.21-1/include/linux/swap.h	Fri Jun 13 10:40:24 2003
@@ -82,6 +82,7 @@
 
 /* Swap 50% full? Release swapcache more aggressively.. */
 #define vm_swap_full() (nr_swap_pages*2 < total_swap_pages)
+#define swap_avail() (nr_swap_pages > 0)
 
 extern unsigned int nr_free_pages(void);
 extern unsigned int nr_free_buffer_pages(void);
diff -urbBd linux-2.4.21/mm/vmscan.c linux-2.4.21-1/mm/vmscan.c
--- linux-2.4.21/mm/vmscan.c	Thu Nov 28 15:53:15 2002
+++ linux-2.4.21-1/mm/vmscan.c	Fri Jun 13 11:26:26 2003
@@ -474,6 +474,18 @@
 			spin_unlock(&pagecache_lock);
 			UnlockPage(page);
 page_mapped:
+                        /* if we don't have swap, it doesn't
+                           do much good to swap things out. */
+			if (!page->mapping && !swap_avail()) {
+				/* Let's make the page active since we
+				   cannot swap it out.  It gets it off
+				   the inactive list. */
+				spin_unlock(&pagemap_lru_lock);
+				activate_page(page);
+				ClearPageReferenced(page);
+				spin_lock(&pagemap_lru_lock);
+				continue;
+			}
 			if (--max_mapped >= 0)
 				continue;