Thank you for the reply.

For the 1st question, is it certain that the SPDK framework will handle remaining uncompleted spdk_bdev_io?

For the 2nd question, what I want is an example of 'json config file' that would do the same thing as calling 'rpc.py log_set_flag nvme' when I start the SPDK app with '-c' option and specify the json config file.

Thanks!