FYI, we noticed the following commit (built with gcc-7):

commit: 618b4d07a4420ca9f01837f183ce7b1ac0b31307 ("scsi: ufs: ufs-mediatek: fix TX LCC disabling timing")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

in testcase: xfstests
with following parameters:

	disk: 4HDD
	fs: xfs
	test: generic-group11

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: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G

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 <rong.a.chen@intel.com>

2020-03-16 18:33:34 export TEST_DIR=/fs/vda
2020-03-16 18:33:34 export TEST_DEV=/dev/vda
2020-03-16 18:33:34 export FSTYP=xfs
2020-03-16 18:33:34 export SCRATCH_MNT=/fs/scratch
2020-03-16 18:33:34 mkdir /fs/scratch -p
2020-03-16 18:33:34 export SCRATCH_DEV=/dev/vdd
2020-03-16 18:33:34 export SCRATCH_LOGDEV=/dev/vdb
meta-data=/dev/vda               isize=512    agcount=4, agsize=16777216 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=0, rmapbt=0, reflink=1
data     =                       bsize=4096   blocks=67108864, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=32768, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
2020-03-16 18:33:35 export MKFS_OPTIONS=-mreflink=1
2020-03-16 18:33:35 sed "s:^:generic/:" //lkp/benchmarks/xfstests/tests/generic-group11
2020-03-16 18:33:35 ./check generic/015 generic/056 generic/092 generic/124 generic/160 generic/192 generic/222 generic/254 generic/287 generic/319 generic/350 generic/381 generic/416 generic/446 generic/484 generic/519 generic/550 generic/580
FSTYP         -- xfs (debug)
PLATFORM      -- Linux/x86_64 vm-snb-15 5.6.0-rc1-00021-g618b4d07a4420 #1 SMP Mon Mar 16 17:42:08 CST 2020
MKFS_OPTIONS  -- -f -mreflink=1 /dev/vdd
MOUNT_OPTIONS -- /dev/vdd /fs/scratch

generic/015	 2s
generic/056	 3s
generic/092	 2s
generic/124	 5s
generic/160	 2s
generic/192	 7s
generic/222	 5s
generic/254	 4s
generic/287	 4s
generic/319	 2s
generic/350	 2s
generic/381	 2s
generic/416	 157s
generic/446	 9s
generic/484	- output mismatch (see /lkp/benchmarks/xfstests/results//generic/484.out.bad)
    --- tests/generic/484.out	2020-03-05 16:38:54.000000000 +0800
    +++ /lkp/benchmarks/xfstests/results//generic/484.out.bad	2020-03-16 18:37:07.484545261 +0800
    @@ -1,2 +1,3 @@
     QA output created by 484
    +record lock is not preserved across execve(2)
     Silence is golden
    ...
    (Run 'diff -u /lkp/benchmarks/xfstests/tests/generic/484.out /lkp/benchmarks/xfstests/results//generic/484.out.bad'  to see the entire diff)
generic/519	 2s
generic/550	[not run] xfs_io set_encpolicy  support is missing
generic/580	[not run] xfs_io set_encpolicy  support is missing
Ran: generic/015 generic/056 generic/092 generic/124 generic/160 generic/192 generic/222 generic/254 generic/287 generic/319 generic/350 generic/381 generic/416 generic/446 generic/484 generic/519 generic/550 generic/580
Not run: generic/550 generic/580
Failures: generic/484
Failed 1 of 18 tests




To reproduce:

        # build kernel
	cd linux
	cp config-5.6.0-rc1-00021-g618b4d07a4420 .config
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
	cd <mod-install-dir>
	find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz


        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email



Thanks,
Rong Chen