00:30:02.393  ========== Backtrace start: ==========
00:30:02.393  
00:30:02.393  in /var/jenkins/workspace/nvmf-phy-autotest/spdk/test/nvmf/host/fio.sh:76 -> main(["--transport=rdma"])
00:30:02.393       ...
00:30:02.393     71  		traddr=$NVMF_FIRST_TARGET_IP trsvcid=$NVMF_PORT ns=1" --bs=4096
00:30:02.393     72  		$rpc_py nvmf_delete_subsystem nqn.2016-06.io.spdk:cnode3
00:30:02.393     73  	
00:30:02.393     74  		sync
00:30:02.393     75  		# Delete lvol_bdev and destroy lvol_store.
00:30:02.393  => 76  		$rpc_py bdev_lvol_delete lvs_n_0/lbd_nest_0
00:30:02.393     77  		$rpc_py bdev_lvol_delete_lvstore -l lvs_n_0
00:30:02.393     78  		$rpc_py bdev_lvol_delete lvs_0/lbd_0
00:30:02.393     79  		$rpc_py bdev_lvol_delete_lvstore -l lvs_0
00:30:02.393     80  		$rpc_py bdev_nvme_detach_controller Nvme0
00:30:02.393     81  	fi
00:30:02.393       ...
00:30:02.393  
00:30:02.393  ========== Backtrace end ==========