FYI, we noticed the following commit:

https://github.com/0day-ci/linux Jun-He/EXT4-Avoid-zeroout-ing-and-writting-the-same-space/20160531-030238
commit b07de1aedd04353851c8746b4748c81d9933f8d9 ("EXT4: Avoid zeroout-ing and writting the same space")

in testcase: xfstests
with following parameters: disk=4HDD/fs=ext4/test=generic-quick1

on test machine: lkp-ws02:  threads Westmere-EP with 16G memory

caused below changes:




2016-06-11 13:52:30 export TEST_DIR=/fs/sdd1
2016-06-11 13:52:30 export TEST_DEV=/dev/sdd1
2016-06-11 13:52:30 export FSTYP=ext4
2016-06-11 13:52:30 export SCRATCH_MNT=/fs/scratch
2016-06-11 13:52:30 mkdir /fs/scratch -p
2016-06-11 13:52:30 export SCRATCH_DEV=/dev/sdg1
2016-06-11 13:52:30 ./check generic/001 generic/002 generic/003 generic/004 generic/005 generic/006 generic/007 generic/008 generic/009 generic/011 generic/012 generic/014 generic/015 generic/015 generic/016 generic/018 generic/020 generic/021 generic/022 generic/023 generic/024 generic/025 generic/026 generic/028 generic/029 generic/030 generic/031 generic/032 generic/033 generic/034 generic/035 generic/036 generic/037 generic/039 generic/040 generic/041 generic/042 generic/043 generic/044 generic/045 generic/046 generic/047 generic/048 generic/049 generic/050 generic/051 generic/052 generic/052 generic/053 generic/054 generic/054 generic/055 generic/055 generic/056 generic/057 generic/058 generic/059 generic/060 generic/061 generic/062 generic/064 generic/065 generic/066 generic/067 generic/069 generic/071 generic/072 generic/073 generic/077 generic/078 generic/079 generic/080 generic/082 generic/084 generic/085 generic/086 generic/087
FSTYP         -- ext4
PLATFORM      -- Linux/x86_64 lkp-ws02 4.6.0-rc4-00024-gb07de1a
MKFS_OPTIONS  -- /dev/sdg1
MOUNT_OPTIONS -- -o acl,user_xattr /dev/sdg1 /fs/scratch

generic/001	 4s
generic/002	 1s
generic/003	 15s
generic/004	 0s
generic/005	 1s
generic/006	 1s
generic/007	 1s
generic/008	 1s
generic/009	 1s
generic/011	 1s
generic/012	 - output mismatch (see /lkp/benchmarks/xfstests/results//generic/012.out.bad)
    --- tests/generic/012.out	2015-12-18 15:28:50.000000000 +0800
    +++ /lkp/benchmarks/xfstests/results//generic/012.out.bad	2016-06-11 13:53:06.903410250 +0800
    @@ -40,7 +40,7 @@
     0f0151cbed83e4bf6e5bde26e82ab115
     	12. unwritten -> data -> unwritten
     0: [0..63]: extent
    -76cc863b386460b228a493933813a6a0
    +0f0151cbed83e4bf6e5bde26e82ab115
     	13. data -> unwritten -> data
     0: [0..63]: extent
    ...
    (Run 'diff -u tests/generic/012.out /lkp/benchmarks/xfstests/results//generic/012.out.bad'  to see the entire diff)
generic/014	 0s
generic/015	 1s
generic/016	 2s
generic/018	 5s
generic/020	 1s
generic/021	 - output mismatch (see /lkp/benchmarks/xfstests/results//generic/021.out.bad)
    --- tests/generic/021.out	2015-12-18 15:28:50.000000000 +0800
    +++ /lkp/benchmarks/xfstests/results//generic/021.out.bad	2016-06-11 13:53:20.426241191 +0800
    @@ -40,7 +40,7 @@
     0f0151cbed83e4bf6e5bde26e82ab115
     	12. unwritten -> data -> unwritten
     0: [0..63]: extent
    -bb7df04e1b0a2570657527a7e108ae23
    +511178b4030253826c7a88892bf0f835
     	13. data -> unwritten -> data
     0: [0..63]: extent
    ...
    (Run 'diff -u tests/generic/021.out /lkp/benchmarks/xfstests/results//generic/021.out.bad'  to see the entire diff)
generic/022	 2s
generic/023	 0s
generic/024	 1s
generic/025	 1s
generic/026	 [not run] ext4 does not define maximum ACL count
generic/028	 5s
generic/029	 3s
generic/030	 4s
generic/031	 3s
generic/032	 15s
generic/033	 2s
generic/034	 3s
generic/035	 1s
generic/036	 10s
generic/037	 6s
generic/039	 3s
generic/040	 9s
generic/041	 12s
generic/042	 [not run] ext4 does not support shutdown
generic/043	 [not run] ext4 does not support shutdown
generic/044	 [not run] ext4 does not support shutdown
generic/045	 [not run] ext4 does not support shutdown
generic/046	 [not run] ext4 does not support shutdown
generic/047	 [not run] ext4 does not support shutdown
generic/048	 [not run] ext4 does not support shutdown
generic/049	 [not run] ext4 does not support shutdown
generic/050	 [not run] ext4 does not support shutdown
generic/051	 [not run] ext4 does not support shutdown
generic/052	 [not run] ext4 does not support shutdown
generic/053	 3s
generic/054	 [not run] ext4 does not support shutdown
generic/055	 [not run] ext4 does not support shutdown
generic/056	 3s
generic/057	 3s
generic/058	 2s
generic/059	 3s
generic/060	 2s
generic/061	 2s
generic/062	 3s
generic/064	 4s
generic/065	 3s
generic/066	 3s
generic/067	 3s
generic/069	 6s
generic/071	 3s
generic/072	 45s
generic/073	 3s
generic/077	 4s
generic/078	 1s
generic/079	 3s
generic/080	 2s
generic/082	 2s
generic/084	 8s
generic/085	 6s
generic/086	 0s
generic/087	 1s
Ran: generic/001 generic/002 generic/003 generic/004 generic/005 generic/006 generic/007 generic/008 generic/009 generic/011 generic/012 generic/014 generic/015 generic/016 generic/018 generic/020 generic/021 generic/022 generic/023 generic/024 generic/025 generic/028 generic/029 generic/030 generic/031 generic/032 generic/033 generic/034 generic/035 generic/036 generic/037 generic/039 generic/040 generic/041 generic/053 generic/056 generic/057 generic/058 generic/059 generic/060 generic/061 generic/062 generic/064 generic/065 generic/066 generic/067 generic/069 generic/071 generic/072 generic/073 generic/077 generic/078 generic/079 generic/080 generic/082 generic/084 generic/085 generic/086 generic/087
Not run: generic/026 generic/042 generic/043 generic/044 generic/045 generic/046 generic/047 generic/048 generic/049 generic/050 generic/051 generic/052 generic/054 generic/055
Failures: generic/012 generic/021
Failed 2 of 59 tests





To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Xiaolong