Greeting,

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

commit: 2df83a0575ff23a9c992a35f2e98f252dc148507 ("f2fs: avoid an infinite loop in f2fs_sync_dirty_inodes")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

in testcase: xfstests
version: xfstests-x86_64-1de1db8-1_20220214
with following parameters:

	disk: 4HDD
	fs: f2fs
	test: generic-group-31
	ucode: 0xe2

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: 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 <oliver.sang@intel.com>

2022-02-15 21:09:42 export TEST_DIR=/fs/sda1
2022-02-15 21:09:42 export TEST_DEV=/dev/sda1
2022-02-15 21:09:42 export FSTYP=f2fs
2022-02-15 21:09:42 export SCRATCH_MNT=/fs/scratch
2022-02-15 21:09:42 mkdir /fs/scratch -p
2022-02-15 21:09:42 export SCRATCH_DEV=/dev/sda4
2022-02-15 21:09:42 export MKFS_OPTIONS=-f
2022-02-15 21:09:42 sed "s:^:generic/:" //lkp/benchmarks/xfstests/tests/generic-group-31
2022-02-15 21:09:42 ./check generic/620 generic/621 generic/622 generic/623 generic/624 generic/625 generic/626 generic/627 generic/628 generic/629 generic/630 generic/631 generic/632 generic/633 generic/634 generic/635 generic/636 generic/637 generic/638 generic/639
FSTYP         -- f2fs
PLATFORM      -- Linux/x86_64 lkp-skl-d04 5.17.0-rc1-00043-g2df83a0575ff #1 SMP Tue Feb 15 17:38:21 CST 2022
MKFS_OPTIONS  -- -f /dev/sda4
MOUNT_OPTIONS -- -o acl,user_xattr /dev/sda4 /fs/scratch

generic/620	[not run] f2fs doesn't support >16T filesystem
generic/621	[not run] xfs_io get_encpolicy doesn't support -t
generic/622	 41s
generic/623	 6s
generic/624	[not run] kernel f2fs isn't configured with verity support
generic/625	[not run] kernel f2fs isn't configured with verity support
generic/626	 4s
generic/627	 44s
generic/628	[not run] Reflink not supported by scratch filesystem type: f2fs
generic/629	 9s
generic/630	[not run] Dedupe not supported by scratch filesystem type: f2fs
generic/631	- output mismatch (see /lkp/benchmarks/xfstests/results//generic/631.out.bad)
    --- tests/generic/631.out	2022-02-14 17:05:52.000000000 +0000
    +++ /lkp/benchmarks/xfstests/results//generic/631.out.bad	2022-02-15 21:12:24.527868011 +0000
    @@ -1,2 +1,3 @@
     QA output created by 631
    +mv: cannot move '/fs/scratch/merged5/etc/access.conf' to '/fs/scratch/merged5/etc/access.conf.bak': Input/output error
     Silence is golden.
    ...
    (Run 'diff -u /lkp/benchmarks/xfstests/tests/generic/631.out /lkp/benchmarks/xfstests/results//generic/631.out.bad'  to see the entire diff)
generic/632	 5s
generic/633	 6s
generic/634	 6s
generic/635	 9s
generic/636	 9s
generic/637	 3s
generic/638	 4s
generic/639	 3s
Ran: generic/620 generic/621 generic/622 generic/623 generic/624 generic/625 generic/626 generic/627 generic/628 generic/629 generic/630 generic/631 generic/632 generic/633 generic/634 generic/635 generic/636 generic/637 generic/638 generic/639
Not run: generic/620 generic/621 generic/624 generic/625 generic/628 generic/630
Failures: generic/631
Failed 1 of 20 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.



---
0DAY/LKP+ Test Infrastructure                   Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org       Intel Corporation

Thanks,
Oliver Sang