Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 20b58d1e6b9cda142cd142a0a2f94c0d04b0a5a0 ("[RFC] scsi_debug: add hosts initialization --> worker") url: https://github.com/0day-ci/linux/commits/Douglas-Gilbert/scsi_debug-add-hosts-initialization-worker/20210319-230817 base: https://git.kernel.org/cgit/linux/kernel/git/jejb/scsi.git for-next in testcase: blktests version: blktests-x86_64-a210761-1_20210124 with following parameters: disk: 1SSD test: block-group-00 ucode: 0xe2 on test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz with 32G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot 2021-03-21 02:40:23 sed "s:^:block/:" /lkp/benchmarks/blktests/tests/block-group-00 2021-03-21 02:40:23 ./check block/001 block/001 (stress device hotplugging) block/001 (stress device hotplugging) [failed] runtime ... 30.370s --- tests/block/001.out 2021-01-24 06:04:08.000000000 +0000 +++ /lkp/benchmarks/blktests/results/nodev/block/001.out.bad 2021-03-21 02:40:53.652003261 +0000 @@ -1,4 +1,7 @@ Running block/001 Stressing sd +ls: cannot access '/sys/class/scsi_device/4:0:0:0/device/block': No such file or directory +ls: cannot access '/sys/class/scsi_device/5:0:0:0/device/block': No such file or directory Stressing sr +ls: cannot access '/sys/class/scsi_device/4:0:0:0/device/block': No such file or directory Test complete To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml bin/lkp run compatible-job.yaml --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang