Re: [PATCH 1/2] blk-mq: adjust debugfs and sysfs register when updating nr_hw_queues

[jianchao.wang]

Hi Ming

On 09/29/2018 10:49 AM, Ming Lei wrote:
> Looks both blk_mq_sysfs_register() and blk_mq_debugfs_register_hctx()
> are removed from the path of blk_mq_init_allocated_queue(), so where are
> the two registered for a freshly new queue?

Initially, both of them are registered by following path.
__device_add_disk
  -> blk_register_queue

	if (q->mq_ops) {
		__blk_mq_register_dev(dev, q);
		blk_mq_debugfs_register(q);
	}

blk_mq_init_allocated_queue won't do any thing.

Thanks
Jianchao