[RFC 05/13] Memoryless Node: Slab support

[clameter@sgi.com]

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Slab should not allocate control structures for nodes without memory. This may work right
now but its unreliable since not all allocations can fall back due to the use of GFP_THISNODE.

Switching a few for_each_online_node's to for_each_memory_node will allow us to
only allocate for nodes that actually have memory.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6.22-rc4-mm2/mm/slab.c
===================================================================
--- linux-2.6.22-rc4-mm2.orig/mm/slab.c	2007-06-13 23:16:51.000000000 -0700
+++ linux-2.6.22-rc4-mm2/mm/slab.c	2007-06-13 23:20:29.000000000 -0700
@@ -1562,7 +1562,7 @@ void __init kmem_cache_init(void)
 		/* Replace the static kmem_list3 structures for the boot cpu */
 		init_list(&cache_cache, &initkmem_list3[CACHE_CACHE], node);
 
-		for_each_online_node(nid) {
+		for_each_memory_node(nid) {
 			init_list(malloc_sizes[INDEX_AC].cs_cachep,
 				  &initkmem_list3[SIZE_AC + nid], nid);
 
@@ -1940,7 +1940,7 @@ static void __init set_up_list3s(struct 
 {
 	int node;
 
-	for_each_online_node(node) {
+	for_each_memory_node(node) {
 		cachep->nodelists[node] = &initkmem_list3[index + node];
 		cachep->nodelists[node]->next_reap = jiffies +
 		    REAPTIMEOUT_LIST3 +
@@ -2071,7 +2071,7 @@ static int __init_refok setup_cpu_cache(
 			g_cpucache_up = PARTIAL_L3;
 		} else {
 			int node;
-			for_each_online_node(node) {
+			for_each_memory_node(node) {
 				cachep->nodelists[node] =
 				    kmalloc_node(sizeof(struct kmem_list3),
 						GFP_KERNEL, node);
@@ -3828,7 +3828,7 @@ static int alloc_kmemlist(struct kmem_ca
 	struct array_cache *new_shared;
 	struct array_cache **new_alien = NULL;
 
-	for_each_online_node(node) {
+	for_each_memory_node(node) {
 
                 if (use_alien_caches) {
                         new_alien = alloc_alien_cache(node, cachep->limit);

-- 

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