[PATCH] NUMA aware block device control structure allocation

Patch to allocate the control structures for for ide devices on the node of
the device itself (for NUMA systems).  The patch depends on the Slab API
change patch by Manfred and me (in mm) and the pcidev_to_node patch that I
posted today.

Does some realignment too.

Signed-off-by: Justin M. Forbes <jmforbes@linuxtx.org>
Signed-off-by: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Pravin Shelar <pravin@calsoftinc.com>
Signed-off-by: Shobhit Dayal <shobhit@calsoftinc.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

mm/mempool.c

@@ -51,16 +51,23 @@ static void free_pool(mempool_t *pool)
  * functions might sleep - as long as the mempool_alloc function is not called
  * from IRQ contexts.
  */
-mempool_t * mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
+mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
 				mempool_free_t *free_fn, void *pool_data)
 {
-	mempool_t *pool;
+	return  mempool_create_node(min_nr,alloc_fn,free_fn, pool_data,-1);
+}
+EXPORT_SYMBOL(mempool_create);
 
-	pool = kmalloc(sizeof(*pool), GFP_KERNEL);
+mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
+			mempool_free_t *free_fn, void *pool_data, int node_id)
+{
+	mempool_t *pool;
+	pool = kmalloc_node(sizeof(*pool), GFP_KERNEL, node_id);
 	if (!pool)
 		return NULL;
 	memset(pool, 0, sizeof(*pool));
-	pool->elements = kmalloc(min_nr * sizeof(void *), GFP_KERNEL);
+	pool->elements = kmalloc_node(min_nr * sizeof(void *),
+					GFP_KERNEL, node_id);
 	if (!pool->elements) {
 		kfree(pool);
 		return NULL;
@@ -87,7 +94,7 @@ mempool_t * mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
 	}
 	return pool;
 }
-EXPORT_SYMBOL(mempool_create);
+EXPORT_SYMBOL(mempool_create_node);
 
 /**
  * mempool_resize - resize an existing memory pool