From 7c55bf26b96c4c5631c3bbc2f6137089ac3d2e86 Mon Sep 17 00:00:00 2001
From: Christoph Lameter <clameter@sgi.com>
Date: Fri, 27 Jul 2007 15:43:48 -0400
Subject: [PATCH] Memoryless Nodes: No need for kswapd

A node without memory does not need a kswapd. So use the memory map instead
of the online map when starting kswapd.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Nishanth Aravamudan <nacc@us.ibm.com>
Tested-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Acked-by: Bob Picco <bob.picco@hp.com>

Index: linux-2.6/mm/vmscan.c
===================================================================
--- linux-2.6.orig/mm/vmscan.c	2007-07-31 21:08:00.000000000 -0700
+++ linux-2.6/mm/vmscan.c	2007-07-31 21:19:42.000000000 -0700
@@ -1674,7 +1674,7 @@ static int __init kswapd_init(void)
 	int nid;
 
 	swap_setup();
-	for_each_online_node(nid)
+	for_each_node_state(nid, N_HIGH_MEMORY)
  		kswapd_run(nid);
 	hotcpu_notifier(cpu_callback, 0);
 	return 0;