diff -Naurp -X /home/jbarnes/dontdiff 200-udelay-preempt-fix.patch/mm/page_alloc.c 210-nr-free-pages-fix.patch/mm/page_alloc.c
--- 200-udelay-preempt-fix.patch/mm/page_alloc.c	Thu Feb 12 10:23:10 2004
+++ 210-nr-free-pages-fix.patch/mm/page_alloc.c	Thu Feb 12 10:27:56 2004
@@ -755,11 +755,23 @@ EXPORT_SYMBOL(free_pages);
  */
 unsigned int nr_free_pages(void)
 {
-	unsigned int sum = 0;
+	static unsigned long jiffies_last_compute = 0;
+	static unsigned int  free_pages_last_compute = 0;
+	pg_data_t *pgdat;
+	unsigned int sum, n;
 	struct zone *zone;
 
-	for_each_zone(zone)
-		sum += zone->free_pages;
+#define RECALC_TICKS	10
+
+	if (jiffies < jiffies_last_compute)
+		return free_pages_last_compute;
+
+	jiffies_last_compute = jiffies + RECALC_TICKS;
+	sum = 0;
+	for_each_pgdat(pgdat)
+		for (zone=pgdat->node_zones,n=0; n<pgdat->nr_zones; n++, zone++)
+			sum += zone->free_pages;
+	free_pages_last_compute = sum;
 
 	return sum;
 }