Index: 2.6.23/block/genhd.c
===================================================================
--- 2.6.23.orig/block/genhd.c
+++ 2.6.23/block/genhd.c
@@ -496,6 +496,7 @@ static void disk_release(struct device *
 {
 	struct gendisk *disk = dev_to_disk(dev);
 
+	printk(KERN_INFO "disk_release: kobj %p\n", &disk->dev.kobj);
 	kfree(disk->random);
 	kfree(disk->part);
 	free_disk_stats(disk);
Index: 2.6.23/block/ll_rw_blk.c
===================================================================
--- 2.6.23.orig/block/ll_rw_blk.c
+++ 2.6.23/block/ll_rw_blk.c
@@ -1781,6 +1781,8 @@ static void blk_release_queue(struct kob
 		container_of(kobj, struct request_queue, kobj);
 	struct request_list *rl = &q->rq;
 
+	printk(KERN_INFO "blk_release_queue: rq %p, parent %p\n",
+			q, q->kobj.parent);
 	blk_sync_queue(q);
 
 	if (rl->rq_pool)
Index: 2.6.23/drivers/scsi/scsi_sysfs.c
===================================================================
--- 2.6.23.orig/drivers/scsi/scsi_sysfs.c
+++ 2.6.23/drivers/scsi/scsi_sysfs.c
@@ -238,6 +238,8 @@ static void scsi_device_dev_release_user
 	list_del(&sdev->starved_entry);
 	spin_unlock_irqrestore(sdev->host->host_lock, flags);
 
+	printk(KERN_INFO "scsi_device_dev_release: rq %p\n",
+			sdev->request_queue);
 	if (sdev->request_queue) {
 		sdev->request_queue->queuedata = NULL;
 		/* user context needed to free queue */
Index: 2.6.23/fs/partitions/check.c
===================================================================
--- 2.6.23.orig/fs/partitions/check.c
+++ 2.6.23/fs/partitions/check.c
@@ -516,5 +516,9 @@ void del_gendisk(struct gendisk *disk)
 	sysfs_remove_link(&block_depr, disk->dev.bus_id);
 #endif
 	device_del(&disk->dev);
-	put_device(&disk->dev);
+	printk(KERN_INFO "del_gendisk %s, kobj %p, queue %p, "
+			"refcount before put_device %d\n",
+			disk->dev.bus_id, &disk->dev.kobj, disk->queue,
+			atomic_read(&disk->dev.kobj.kref.refcount));
+//	put_device(&disk->dev);
 }
Index: 2.6.23/drivers/scsi/sd.c
===================================================================
--- 2.6.23.orig/drivers/scsi/sd.c
+++ 2.6.23/drivers/scsi/sd.c
@@ -1738,6 +1738,10 @@ static void scsi_disk_release(struct cla
 	spin_unlock(&sd_index_lock);
 
 	disk->private_data = NULL;
+	printk(KERN_INFO "scsi_disk_release: disk %s, kobj %p, "
+			"refcount before put_disk %d\n",
+			disk->dev.bus_id, &disk->dev.kobj,
+			atomic_read(&disk->dev.kobj.kref.refcount));
 	put_disk(disk);
 	put_device(&sdkp->device->sdev_gendev);