Greeting,

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

commit: 11b5156248eb1aab1d6f8bb7fdf2bb6e19c73a3f ("[PATCH 2/2] iomap: zero cached pages over unwritten extents on zero range")
url: https://github.com/0day-ci/linux/commits/Brian-Foster/iomap-zero-dirty-pages-over-unwritten-extents/20201012-220518
base: https://git.kernel.org/cgit/fs/xfs/xfs-linux.git for-next

in testcase: xfstests
version: xfstests-x86_64-d41dcbd-1_20201007
with following parameters:

	disk: 4HDD
	fs: xfs
	test: xfs-rmapbt
	ucode: 0x28

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 Intel(R) Core(TM) i7-4790 v3 @ 3.60GHz with 6G 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 <rong.a.chen@intel.com>

2020-10-22 13:11:24 export TEST_DIR=/fs/sdb1
2020-10-22 13:11:24 export TEST_DEV=/dev/sdb1
2020-10-22 13:11:24 export FSTYP=xfs
2020-10-22 13:11:24 export SCRATCH_MNT=/fs/scratch
2020-10-22 13:11:24 mkdir /fs/scratch -p
2020-10-22 13:11:24 export SCRATCH_DEV=/dev/sdb4
2020-10-22 13:11:24 export SCRATCH_LOGDEV=/dev/sdb2
2020-10-22 13:11:24 export SCRATCH_XFS_LIST_METADATA_FIELDS=u3.sfdir3.hdr.parent.i4
2020-10-22 13:11:24 export SCRATCH_XFS_LIST_FUZZ_VERBS=random
2020-10-22 13:11:24 export MKFS_OPTIONS=-mrmapbt=1
2020-10-22 13:11:24 sed "s:^:xfs/:" //lkp/benchmarks/xfstests/tests/xfs-rmapbt | grep -F -f merged_ignored_files
2020-10-22 13:11:24 sed "s:^:xfs/:" //lkp/benchmarks/xfstests/tests/xfs-rmapbt | grep -v -F -f merged_ignored_files
2020-10-22 13:11:24 ./check xfs/114 xfs/233 xfs/234 xfs/235 xfs/236 xfs/271 xfs/272 xfs/277 xfs/310 xfs/317 xfs/332 xfs/333 xfs/368 xfs/369 xfs/370 xfs/371 xfs/422 xfs/450 xfs/462 xfs/463 xfs/517
FSTYP         -- xfs (debug)
PLATFORM      -- Linux/x86_64 lkp-hsw-d02 5.9.0-rc4-00087-g11b5156248eb1 #1 SMP Tue Oct 13 20:22:06 CST 2020
MKFS_OPTIONS  -- -f -mrmapbt=1 /dev/sdb4
MOUNT_OPTIONS -- /dev/sdb4 /fs/scratch

xfs/114	 3s
xfs/233	 1059s
xfs/234	 348s
xfs/235	 7s
xfs/236	 13s
xfs/271	- output mismatch (see /lkp/benchmarks/xfstests/results//xfs/271.out.bad)
    --- tests/xfs/271.out	2020-10-07 10:39:37.000000000 +0000
    +++ /lkp/benchmarks/xfstests/results//xfs/271.out.bad	2020-10-22 13:35:19.723880557 +0000
    @@ -4,7 +4,8 @@
     Check AG header
     AG header count is in range
     Check freesp/rmap btrees
    -freesp extent count is in range
    +freesp extent count has value of 9
    +freesp extent count is NOT in range 12 .. 1000011
     Check inode btrees
    ...
    (Run 'diff -u /lkp/benchmarks/xfstests/tests/xfs/271.out /lkp/benchmarks/xfstests/results//xfs/271.out.bad'  to see the entire diff)
xfs/272	 3s
xfs/277	 3s
xfs/310	- output mismatch (see /lkp/benchmarks/xfstests/results//xfs/310.out.bad)
    --- tests/xfs/310.out	2020-10-07 10:39:37.000000000 +0000
    +++ /lkp/benchmarks/xfstests/results//xfs/310.out.bad	2020-10-22 13:35:28.850879806 +0000
    @@ -3,11 +3,21 @@
     Format huge device
     Create the original file blocks
     Check extent count
    +/fs/scratch/test-310/file1:
    + EXT: FILE-OFFSET           BLOCK-RANGE        AG AG-OFFSET              TOTAL FLAGS
    +   0: [0..8388599]:         192..8388791        0 (192..8388791)       8388600 010000
    +   1: [8388600..8388607]:   8388792..8388799    0 (8388792..8388799)         8 000000
    ...
    (Run 'diff -u /lkp/benchmarks/xfstests/tests/xfs/310.out /lkp/benchmarks/xfstests/results//xfs/310.out.bad'  to see the entire diff)
xfs/317	 4s
xfs/332	 3s
xfs/333	[not run] realtime rmapbt not supported
xfs/368	 81s
xfs/369	 7s
xfs/370	 7s
xfs/371	 7s
xfs/422	- output mismatch (see /lkp/benchmarks/xfstests/results//xfs/422.out.bad)
    --- tests/xfs/422.out	2020-10-07 10:39:37.000000000 +0000
    +++ /lkp/benchmarks/xfstests/results//xfs/422.out.bad	2020-10-22 13:37:54.937867791 +0000
    @@ -1,4 +1,196 @@
     QA output created by 422
     Format and populate
     Concurrent repair
    +scrub: Operation not supported
    +scrub: Operation not supported
    +scrub: Operation not supported
    +scrub: Operation not supported
    ...
    (Run 'diff -u /lkp/benchmarks/xfstests/tests/xfs/422.out /lkp/benchmarks/xfstests/results//xfs/422.out.bad'  to see the entire diff)
xfs/450	 4s
xfs/462	 6s
xfs/463	 7s
xfs/517	 36s
Ran: xfs/114 xfs/233 xfs/234 xfs/235 xfs/236 xfs/271 xfs/272 xfs/277 xfs/310 xfs/317 xfs/332 xfs/333 xfs/368 xfs/369 xfs/370 xfs/371 xfs/422 xfs/450 xfs/462 xfs/463 xfs/517
Not run: xfs/333
Failures: xfs/271 xfs/310 xfs/422
Failed 3 of 21 tests




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 run     job.yaml



Thanks,
Rong Chen