Increasing pageset size gives improvements on kbuild on my Xeon.

Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c
+++ linux-2.6/mm/page_alloc.c
@@ -1784,7 +1784,7 @@ inline void setup_pageset(struct per_cpu
 	memset(p, 0, sizeof(*p));
 	p->count = 0;
 	p->cold_count = 0;
-	p->high = 6 * batch;
+	p->high = 16 * batch;
 	p->batch = max(1UL, 1 * batch);
 	INIT_LIST_HEAD(&p->list);
 }