linux-kernel - Re: [linus:master] [btrfs] 5f58d783fd: xfstests.btrfs.172.fail

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Date:   Fri, 17 Mar 2023 12:14:20 +0800
From:   Anand Jain <anand.jain@...cle.com>
To:     kernel test rboot <oliver.sang@...el.com>
Cc:     oe-lkp@...ts.linux.dev, lkp@...el.com,
        linux-kernel@...r.kernel.org, David Sterba <dsterba@...e.com>,
        Daan De Meyer <daandemeyer@...com>,
        Josef Bacik <josef@...icpanda.com>, linux-btrfs@...r.kernel.org
Subject: Re: [linus:master] [btrfs] 5f58d783fd: xfstests.btrfs.172.fail



On 3/17/23 09:17, kernel test rboot wrote:
> 
> Greeting,
> 
> FYI, we noticed xfstests.btrfs.172.fail due to commit (built with gcc-11):
> 
> commit: 5f58d783fd7823b2c2d5954d1126e702f94bfc4c ("btrfs: free device in btrfs_close_devices for a single device filesystem")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> 
> in testcase: xfstests
> version: xfstests-i386-5a5e419-1_20220926
> with following parameters:
> 
> 	disk: 6HDD
> 	fs: btrfs
> 	test: btrfs-logwrites
> 
> test-description: xfstests is a regression test suite for xfs and other files ystems.
> test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git
> 
> 
> on test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (Haswell) with 8G memory
> 
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
> 
> 
> we did this test on i386 and we found the issue doesn't always happen,
> on both this commit and v6.3-rc2, it failed in about half of tests.
> however, always clean on parent commit 519b7e13b5ae8dd3.
> 
> 519b7e13b5ae8dd3 5f58d783fd7823b2c2d5954d112                    v6.3-rc2
> ---------------- --------------------------- ---------------------------
>         fail:runs  %reproduction    fail:runs  %reproduction    fail:runs
>             |             |             |             |             |
>             :14          23%           7:13          33%          10:19    xfstests.btrfs.172.fail
>           14:14         -27%           6:13         -17%           9:19    xfstests.btrfs.172.pass
> 
> 
> 
> If you fix the issue, kindly add following tag
> | Reported-by: kernel test robot <oliver.sang@...el.com>
> | Link: https://lore.kernel.org/oe-lkp/202303170839.fdf23068-oliver.sang@intel.com
> 
> 2023-03-08 04:47:50 export TEST_DIR=/fs/sdb1
> 2023-03-08 04:47:50 export TEST_DEV=/dev/sdb1
> 2023-03-08 04:47:50 export FSTYP=btrfs
> 2023-03-08 04:47:50 export SCRATCH_MNT=/fs/scratch
> 2023-03-08 04:47:50 mkdir /fs/scratch -p
> 2023-03-08 04:47:50 export SCRATCH_DEV_POOL="/dev/sdb2 /dev/sdb3 /dev/sdb4 /dev/sdb5 /dev/sdb6"
> 2023-03-08 04:47:50 export LOGWRITES_DEV=/dev/sdb2
> 2023-03-08 04:47:50 export SCRATCH_DEV=/dev/sdb6
> 2023-03-08 04:47:50 unset SCRATCH_DEV_POOL
> 2023-03-08 04:47:50 sed "s:^:btrfs/:" //lkp/benchmarks/xfstests/tests/btrfs-logwrites
> 2023-03-08 04:47:50 ./check btrfs/291 btrfs/206 btrfs/196 btrfs/192 btrfs/190 btrfs/172
> FSTYP         -- btrfs
> PLATFORM      -- Linux/i686 lkp-hsw-d01 6.1.0-rc8-00284-g5f58d783fd78 #1 SMP Wed Mar  8 11:05:36 CST 2023
> MKFS_OPTIONS  -- /dev/sdb6
> MOUNT_OPTIONS -- /dev/sdb6 /fs/scratch
> 
> btrfs/172       [failed, exit status 1]- output mismatch (see /lkp/benchmarks/xfstests/results//btrfs/172.out.bad)
>      --- tests/btrfs/172.out	2022-09-26 09:38:15.000000000 +0000
>      +++ /lkp/benchmarks/xfstests/results//btrfs/172.out.bad	2023-03-08 04:47:54.134026209 +0000
>      @@ -1,3 +1,5 @@
>       QA output created by 172
>       wrote 5242880/5242880 bytes at offset 0
>       XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

>      +_check_btrfs_filesystem: filesystem on /dev/sdb6 is inconsistent


Thank you for reporting it. I am currently looking into it. It appears
that the device is being freed after it's closed, which could indicate
that we overlooked something at close, just a hypothesis at this point.

-Anand


>      +(see /lkp/benchmarks/xfstests/results//btrfs/172.full for details)
>      ...
>      (Run 'diff -u /lkp/benchmarks/xfstests/tests/btrfs/172.out /lkp/benchmarks/xfstests/results//btrfs/172.out.bad'  to see the entire diff)
> btrfs/190        15s
> btrfs/192        101s
> btrfs/196        163s
> btrfs/206        4s
> btrfs/291       [not run] kernel btrfs isn't configured with verity support
> Ran: btrfs/172 btrfs/190 btrfs/192 btrfs/196 btrfs/206 btrfs/291
> Not run: btrfs/291
> Failures: btrfs/172
> Failed 1 of 6 tests
> 
> 
> 
> 
> To reproduce:
> 
>          git clone https://github.com/intel/lkp-tests.git
>          cd lkp-tests
>          sudo bin/lkp install job.yaml           # job file is attached in this email
>          bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
>          sudo bin/lkp run generated-yaml-file
> 
>          # if come across any failure that blocks the test,
>          # please remove ~/.lkp and /lkp dir to run from a clean state.
> 
> 
>