[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>

11 files changed, 77 insertions, 30 deletions

diff --git a/drivers/block/as-iosched.c b/drivers/block/as-iosched.c
index 638db06de2be..3410b4d294b9 100644
--- a/drivers/block/as-iosched.c
+++ b/drivers/block/as-iosched.c
@@ -1871,20 +1871,22 @@ static int as_init_queue(request_queue_t *q, elevator_t *e)
 	if (!arq_pool)
 		return -ENOMEM;
 
-	ad = kmalloc(sizeof(*ad), GFP_KERNEL);
+	ad = kmalloc_node(sizeof(*ad), GFP_KERNEL, q->node);
 	if (!ad)
 		return -ENOMEM;
 	memset(ad, 0, sizeof(*ad));
 
 	ad->q = q; /* Identify what queue the data belongs to */
 
-	ad->hash = kmalloc(sizeof(struct list_head)*AS_HASH_ENTRIES,GFP_KERNEL);
+	ad->hash = kmalloc_node(sizeof(struct list_head)*AS_HASH_ENTRIES,
+				GFP_KERNEL, q->node);
 	if (!ad->hash) {
 		kfree(ad);
 		return -ENOMEM;
 	}
 
-	ad->arq_pool = mempool_create(BLKDEV_MIN_RQ, mempool_alloc_slab, mempool_free_slab, arq_pool);
+	ad->arq_pool = mempool_create_node(BLKDEV_MIN_RQ, mempool_alloc_slab,
+				mempool_free_slab, arq_pool, q->node);
 	if (!ad->arq_pool) {
 		kfree(ad->hash);
 		kfree(ad);
diff --git a/drivers/block/deadline-iosched.c b/drivers/block/deadline-iosched.c
index 7f79f3dd0165..4bc2fea73273 100644
--- a/drivers/block/deadline-iosched.c
+++ b/drivers/block/deadline-iosched.c
@@ -711,18 +711,20 @@ static int deadline_init_queue(request_queue_t *q, elevator_t *e)
 	if (!drq_pool)
 		return -ENOMEM;
 
-	dd = kmalloc(sizeof(*dd), GFP_KERNEL);
+	dd = kmalloc_node(sizeof(*dd), GFP_KERNEL, q->node);
 	if (!dd)
 		return -ENOMEM;
 	memset(dd, 0, sizeof(*dd));
 
-	dd->hash = kmalloc(sizeof(struct list_head)*DL_HASH_ENTRIES,GFP_KERNEL);
+	dd->hash = kmalloc_node(sizeof(struct list_head)*DL_HASH_ENTRIES,
+				GFP_KERNEL, q->node);
 	if (!dd->hash) {
 		kfree(dd);
 		return -ENOMEM;
 	}
 
-	dd->drq_pool = mempool_create(BLKDEV_MIN_RQ, mempool_alloc_slab, mempool_free_slab, drq_pool);
+	dd->drq_pool = mempool_create_node(BLKDEV_MIN_RQ, mempool_alloc_slab,
+					mempool_free_slab, drq_pool, q->node);
 	if (!dd->drq_pool) {
 		kfree(dd->hash);
 		kfree(dd);
diff --git a/drivers/block/genhd.c b/drivers/block/genhd.c
index 53f7d846b747..43805e4d31e9 100644
--- a/drivers/block/genhd.c
+++ b/drivers/block/genhd.c
@@ -582,10 +582,16 @@ struct seq_operations diskstats_op = {
 	.show	= diskstats_show
 };
 
-
 struct gendisk *alloc_disk(int minors)
 {
-	struct gendisk *disk = kmalloc(sizeof(struct gendisk), GFP_KERNEL);
+	return alloc_disk_node(minors, -1);
+}
+
+struct gendisk *alloc_disk_node(int minors, int node_id)
+{
+	struct gendisk *disk;
+
+	disk = kmalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id);
 	if (disk) {
 		memset(disk, 0, sizeof(struct gendisk));
 		if (!init_disk_stats(disk)) {
@@ -594,7 +600,7 @@ struct gendisk *alloc_disk(int minors)
 		}
 		if (minors > 1) {
 			int size = (minors - 1) * sizeof(struct hd_struct *);
-			disk->part = kmalloc(size, GFP_KERNEL);
+			disk->part = kmalloc_node(size, GFP_KERNEL, node_id);
 			if (!disk->part) {
 				kfree(disk);
 				return NULL;
@@ -610,6 +616,7 @@ struct gendisk *alloc_disk(int minors)
 }
 
 EXPORT_SYMBOL(alloc_disk);
+EXPORT_SYMBOL(alloc_disk_node);
 
 struct kobject *get_disk(struct gendisk *disk)
 {
diff --git a/drivers/block/ll_rw_blk.c b/drivers/block/ll_rw_blk.c
index 81fe3a0c1fe7..cd8cf302068c 100644
--- a/drivers/block/ll_rw_blk.c
+++ b/drivers/block/ll_rw_blk.c
@@ -28,6 +28,7 @@
 #include <linux/slab.h>
 #include <linux/swap.h>
 #include <linux/writeback.h>
+#include <linux/blkdev.h>
 
 /*
  * for max sense size
@@ -1645,7 +1646,8 @@ static int blk_init_free_list(request_queue_t *q)
 	init_waitqueue_head(&rl->wait[WRITE]);
 	init_waitqueue_head(&rl->drain);
 
-	rl->rq_pool = mempool_create(BLKDEV_MIN_RQ, mempool_alloc_slab, mempool_free_slab, request_cachep);
+	rl->rq_pool = mempool_create_node(BLKDEV_MIN_RQ, mempool_alloc_slab,
+				mempool_free_slab, request_cachep, q->node);
 
 	if (!rl->rq_pool)
 		return -ENOMEM;
@@ -1657,8 +1659,15 @@ static int __make_request(request_queue_t *, struct bio *);
 
 request_queue_t *blk_alloc_queue(int gfp_mask)
 {
-	request_queue_t *q = kmem_cache_alloc(requestq_cachep, gfp_mask);
+	return blk_alloc_queue_node(gfp_mask, -1);
+}
+EXPORT_SYMBOL(blk_alloc_queue);
+
+request_queue_t *blk_alloc_queue_node(int gfp_mask, int node_id)
+{
+	request_queue_t *q;
 
+	q = kmem_cache_alloc_node(requestq_cachep, gfp_mask, node_id);
 	if (!q)
 		return NULL;
 
@@ -1671,8 +1680,7 @@ request_queue_t *blk_alloc_queue(int gfp_mask)
 
 	return q;
 }
-
-EXPORT_SYMBOL(blk_alloc_queue);
+EXPORT_SYMBOL(blk_alloc_queue_node);
 
 /**
  * blk_init_queue  - prepare a request queue for use with a block device
@@ -1705,13 +1713,22 @@ EXPORT_SYMBOL(blk_alloc_queue);
  *    blk_init_queue() must be paired with a blk_cleanup_queue() call
  *    when the block device is deactivated (such as at module unload).
  **/
+
 request_queue_t *blk_init_queue(request_fn_proc *rfn, spinlock_t *lock)
 {
-	request_queue_t *q = blk_alloc_queue(GFP_KERNEL);
+	return blk_init_queue_node(rfn, lock, -1);
+}
+EXPORT_SYMBOL(blk_init_queue);
+
+request_queue_t *
+blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
+{
+	request_queue_t *q = blk_alloc_queue_node(GFP_KERNEL, node_id);
 
 	if (!q)
 		return NULL;
 
+	q->node = node_id;
 	if (blk_init_free_list(q))
 		goto out_init;
 
@@ -1754,8 +1771,7 @@ out_init:
 	kmem_cache_free(requestq_cachep, q);
 	return NULL;
 }
-
-EXPORT_SYMBOL(blk_init_queue);
+EXPORT_SYMBOL(blk_init_queue_node);
 
 int blk_get_queue(request_queue_t *q)
 {
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 3302cd8eab4c..d6f934886b04 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -1215,7 +1215,8 @@ static int ide_disk_probe(struct device *dev)
 	if (!idkp)
 		goto failed;
 
-	g = alloc_disk(1 << PARTN_BITS);
+	g = alloc_disk_node(1 << PARTN_BITS,
+			pcibus_to_node(drive->hwif->pci_dev->bus));
 	if (!g)
 		goto out_free_idkp;
 
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 5d876f53c697..7df85af75371 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -977,8 +977,9 @@ static int ide_init_queue(ide_drive_t *drive)
 	 *	limits and LBA48 we could raise it but as yet
 	 *	do not.
 	 */
-	 
-	q = blk_init_queue(do_ide_request, &ide_lock);
+
+	q = blk_init_queue_node(do_ide_request, &ide_lock,
+				pcibus_to_node(drive->hwif->pci_dev->bus));
 	if (!q)
 		return 1;
 
@@ -1095,7 +1096,8 @@ static int init_irq (ide_hwif_t *hwif)
 		hwgroup->hwif->next = hwif;
 		spin_unlock_irq(&ide_lock);
 	} else {
-		hwgroup = kmalloc(sizeof(ide_hwgroup_t),GFP_KERNEL);
+		hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), GFP_KERNEL,
+			pcibus_to_node(hwif->drives[0].hwif->pci_dev->bus));
 		if (!hwgroup)
 	       		goto out_up;
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4a99b76c5a33..235c3414d268 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -396,6 +396,7 @@ struct request_queue
 	 */
 	unsigned int		sg_timeout;
 	unsigned int		sg_reserved_size;
+	int			node;
 
 	struct list_head	drain_list;
 
@@ -615,6 +616,8 @@ static inline void blkdev_dequeue_request(struct request *req)
 /*
  * Access functions for manipulating queue properties
  */
+extern request_queue_t *blk_init_queue_node(request_fn_proc *rfn,
+					spinlock_t *lock, int node_id);
 extern request_queue_t *blk_init_queue(request_fn_proc *, spinlock_t *);
 extern void blk_cleanup_queue(request_queue_t *);
 extern void blk_queue_make_request(request_queue_t *, make_request_fn *);
@@ -646,7 +649,8 @@ extern void blk_wait_queue_drained(request_queue_t *, int);
 extern void blk_finish_queue_drain(request_queue_t *);
 
 int blk_get_queue(request_queue_t *);
-request_queue_t *blk_alloc_queue(int);
+request_queue_t *blk_alloc_queue(int gfp_mask);
+request_queue_t *blk_alloc_queue_node(int,int);
 #define blk_put_queue(q) blk_cleanup_queue((q))
 
 /*
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 47dedaf971d6..af26dc718ef6 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -403,6 +403,7 @@ extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
 extern void add_partition(struct gendisk *, int, sector_t, sector_t);
 extern void delete_partition(struct gendisk *, int);
 
+extern struct gendisk *alloc_disk_node(int minors, int node_id);
 extern struct gendisk *alloc_disk(int minors);
 extern struct kobject *get_disk(struct gendisk *disk);
 extern void put_disk(struct gendisk *disk);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 336d6e509f59..92129078d4f3 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -917,7 +917,7 @@ typedef struct hwif_s {
 	unsigned dma;
 
 	void (*led_act)(void *data, int rw);
-} ide_hwif_t;
+} ____cacheline_maxaligned_in_smp ide_hwif_t;
 
 /*
  *  internal ide interrupt handler type
diff --git a/include/linux/mempool.h b/include/linux/mempool.h
index 4a36edf1c974..796220ce47cc 100644
--- a/include/linux/mempool.h
+++ b/include/linux/mempool.h
@@ -20,9 +20,14 @@ typedef struct mempool_s {
 	mempool_free_t *free;
 	wait_queue_head_t wait;
 } mempool_t;
-extern mempool_t * mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
-				 mempool_free_t *free_fn, void *pool_data);
-extern int mempool_resize(mempool_t *pool, int new_min_nr, unsigned int __nocast gfp_mask);
+
+extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
+			mempool_free_t *free_fn, void *pool_data);
+extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
+			mempool_free_t *free_fn, void *pool_data, int nid);
+
+extern int mempool_resize(mempool_t *pool, int new_min_nr,
+			unsigned int __nocast gfp_mask);
 extern void mempool_destroy(mempool_t *pool);
 extern void * mempool_alloc(mempool_t *pool, unsigned int __nocast gfp_mask);
 extern void mempool_free(void *element, mempool_t *pool);
diff --git a/mm/mempool.c b/mm/mempool.c
index c9f3d4620428..920c8c3ab1b8 100644
--- a/mm/mempool.c
+++ b/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