linux-kernel - [null_blk] de3510e52b: blktests.block.014.fail

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Date:   Wed, 7 Apr 2021 16:59:42 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Damien Le Moal <damien.lemoal@....com>
Cc:     Jens Axboe <axboe@...nel.dk>,
        Johannes Thumshirn <Johannes.Thumshirn@....com>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
        lkp@...el.com
Subject: [null_blk]  de3510e52b: blktests.block.014.fail



Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: de3510e52b0a398261271455562458003b8eea62 ("null_blk: fix command timeout completion handling")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master


in testcase: blktests
version: blktests-x86_64-a210761-1_20210124
with following parameters:

	disk: 1SSD
	test: nvme-group-00
	ucode: 0x11



on test machine: 288 threads Intel(R) Xeon Phi(TM) CPU 7295 @ 1.50GHz with 80G 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 <oliver.sang@...el.com>


block/014 (run null-blk with blk-mq and timeout injection configured)
block/014 (run null-blk with blk-mq and timeout injection configured) [failed]
    runtime  ...  71.624s
    --- tests/block/014.out     2021-01-24 06:04:08.000000000 +0000
    +++ /mnt/nvme-group-00/nodev/block/014.out.bad      2021-04-06 09:21:25.133971868 +0000
    @@ -1,2 +1,377 @@
     Running block/014
    +dd: error reading '/dev/nullb0': Connection timed out
    +dd: error reading '/dev/nullb0': Connection timed out
    +dd: error reading '/dev/nullb0': Connection timed out
    +dd: error reading '/dev/nullb0': Connection timed out
    +dd: error reading '/dev/nullb0': Connection timed out
    +dd: error reading '/dev/nullb0': Connection timed out
    ...
    (Run 'diff -u tests/block/014.out /mnt/nvme-group-00/nodev/block/014.out.bad' to see the entire diff)



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


View attachment "config-5.12.0-rc3-00017-gde3510e52b0a" of type "text/plain" (172899 bytes)

View attachment "job-script" of type "text/plain" (6127 bytes)

Download attachment "kmsg.xz" of type "application/x-xz" (100420 bytes)

View attachment "blktests" of type "text/plain" (27862 bytes)

View attachment "job.yaml" of type "text/plain" (5293 bytes)

View attachment "reproduce" of type "text/plain" (93 bytes)