Testing blktest on nvme device in 4.4, the kernel crashes when excuting test block/008:

block/008 => nvme0n1p3 (do IO while hotplugging CPUs)
runtime     ...


[ 1238.813859] nvme 0000:02:00.0: completed id 433 twice on queue 1
[ 1269.722475] nvme 0000:02:00.0: Timeout I/O 433 QID 3
[ 1299.730435] nvme 0000:02:00.0: Timeout I/O 433 QID 3
[ 1329.730322] nvme 0000:02:00.0: Timeout I/O 433 QID 3
[ 1359.730269] nvme 0000:02:00.0: Timeout I/O 433 QID 3
[ 1389.730194] nvme 0000:02:00.0: Timeout I/O 433 QID 3
[ 1419.730124] nvme 0000:02:00.0: Timeout I/O 433 QID 3
[ 1440.139081] INFO: task powerd:825 blocked for more than 120 seconds.

Could not reproduce on kernel 4.14
 

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