Index: linux-2.6.9-rc1-mm3-kdb/mm/page-writeback.c
===================================================================
--- linux-2.6.9-rc1-mm3-kdb.orig/mm/page-writeback.c	2004-09-03 10:18:57.000000000 -0700
+++ linux-2.6.9-rc1-mm3-kdb/mm/page-writeback.c	2004-09-07 14:46:24.000000000 -0700
@@ -135,32 +135,19 @@
 static void
 get_dirty_limits(struct writeback_state *wbs, long *pbackground, long *pdirty)
 {
-	int background_ratio;		/* Percentages */
-	int dirty_ratio;
-	int unmapped_ratio;
+	int unmapped;
 	long background;
 	long dirty;
 	struct task_struct *tsk;
 
 	get_writeback_state(wbs);
 
-	unmapped_ratio = 100 - (wbs->nr_mapped * 100) / total_pages;
 
-	dirty_ratio = vm_dirty_ratio;
-	if (dirty_ratio > unmapped_ratio / 2)
-		dirty_ratio = unmapped_ratio / 2;
+	unmapped = total_pages - wbs->nr_mapped;
 
-	if (dirty_ratio < 5)
-		dirty_ratio = 5;
+	background = (dirty_background_ratio * unmapped) / 100;
+	dirty      = (vm_dirty_ratio * unmapped) / 100;
 
-	/*
-	 * Keep the ratio between dirty_ratio and background_ratio roughly
-	 * what the sysctls are after dirty_ratio has been scaled (above).
-	 */
-	background_ratio = dirty_background_ratio * dirty_ratio/vm_dirty_ratio;
-
-	background = (background_ratio * total_pages) / 100;
-	dirty = (dirty_ratio * total_pages) / 100;
 	tsk = current;
 	if (tsk->flags & PF_LESS_THROTTLE || rt_task(tsk)) {
 		background += background / 4;