Subject: [PATCH 4/5] powerpc/numa: Disable VPHN on dedicated processor partitions

From: Anton Blanchard <[email-masked]>
Date: Sun, 30 Jan 2011 09:35:22 +1100

There is no need to start up the timer and monitor topology changes on a
dedicated processor partition, so disable it.

Signed-off-by: Anton Blanchard <[email-masked]>
---

Index: linux-2.6/arch/powerpc/mm/numa.c
===================================================================
--- linux-2.6.orig/arch/powerpc/mm/numa.c	2011-01-29 12:58:01.849279835 +1100
+++ linux-2.6/arch/powerpc/mm/numa.c	2011-01-29 12:58:02.489239819 +1100
@@ -1520,7 +1520,8 @@ int start_topology_update(void)
 {
 	int rc = 0;
 
-	if (firmware_has_feature(FW_FEATURE_VPHN)) {
+	if (firmware_has_feature(FW_FEATURE_VPHN) &&
+	    get_lppaca()->shared_proc) {
 		vphn_enabled = 1;
 		setup_cpu_associativity_change_counters();
 		init_timer_deferrable(&topology_timer);