Greeting,

FYI, we noticed xfstests.generic.647.fail due to commit (built with gcc-11):

commit: c84875bf47279cc355a8419d32a4c91233af2f13 ("cifs: Change the I/O paths to use an iterator rather than a page list")
https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/cifs-for-viro

in testcase: xfstests
version: xfstests-x86_64-5a5e419-1_20221128
with following parameters:

	disk: 4HDD
	fs: ext4
	fs2: smbv2
	test: generic-group-32

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) i7-6700 CPU @ 3.40GHz (Skylake) with 16G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


2022-12-07 20:16:53 mount /dev/sda1 /fs/sda1
2022-12-07 20:16:54 mkdir -p /smbv2//cifs/sda1
2022-12-07 20:16:54 export FSTYP=cifs
2022-12-07 20:16:54 export TEST_DEV=//localhost/fs/sda1
2022-12-07 20:16:54 export TEST_DIR=/smbv2//cifs/sda1
2022-12-07 20:16:54 export CIFS_MOUNT_OPTIONS=-ousername=root,password=pass,noperm,vers=2.0,mfsymlinks,actimeo=0
2022-12-07 20:16:54 sed "s:^:generic/:" //lkp/benchmarks/xfstests/tests/generic-group-32
2022-12-07 20:16:54 ./check -E tests/cifs/exclude.incompatible-smb2.txt -E tests/cifs/exclude.very-slow.txt generic/640 generic/641 generic/642 generic/643 generic/644 generic/645 generic/646 generic/647 generic/648 generic/649 generic/651 generic/652 generic/653 generic/654 generic/655 generic/656 generic/657 generic/658 generic/659
FSTYP         -- cifs
PLATFORM      -- Linux/x86_64 lkp-skl-d07 6.1.0-rc4-00010-gc84875bf4727 #1 SMP Thu Dec  8 01:21:18 CST 2022

generic/640       [not run] this test requires a valid $SCRATCH_DEV
generic/641       [not run] this test requires a valid $SCRATCH_DEV
generic/642       [not run] this test requires a valid $SCRATCH_DEV
generic/643       [not run] this test requires a valid $SCRATCH_DEV
generic/644       [not run] vfstest not support by cifs
generic/645       [not run] vfstest not support by cifs
generic/646       [not run] this test requires a valid $SCRATCH_DEV
generic/647       [failed, exit status 1]- output mismatch (see /lkp/benchmarks/xfstests/results//generic/647.out.bad)
    --- tests/generic/647.out	2022-11-28 16:38:08.000000000 +0000
    +++ /lkp/benchmarks/xfstests/results//generic/647.out.bad	2022-12-07 20:17:00.101014397 +0000
    @@ -1,2 +1,3 @@
     QA output created by 647
     Silence is golden
    +mmap-rw-fault: pread is broken
    ...
    (Run 'diff -u /lkp/benchmarks/xfstests/tests/generic/647.out /lkp/benchmarks/xfstests/results//generic/647.out.bad'  to see the entire diff)
generic/648       [not run] this test requires a valid $SCRATCH_DEV
generic/649       [not run] Reflink not supported by test filesystem type: cifs
generic/651       [not run] this test requires a valid $SCRATCH_DEV
generic/652       [not run] this test requires a valid $SCRATCH_DEV
generic/653       [not run] this test requires a valid $SCRATCH_DEV
generic/654       [not run] this test requires a valid $SCRATCH_DEV
generic/655       [not run] this test requires a valid $SCRATCH_DEV
generic/656       [not run] vfstest not support by cifs
generic/657       [not run] this test requires a valid $SCRATCH_DEV
generic/658       [not run] this test requires a valid $SCRATCH_DEV
generic/659       [not run] this test requires a valid $SCRATCH_DEV
Ran: generic/640 generic/641 generic/642 generic/643 generic/644 generic/645 generic/646 generic/647 generic/648 generic/649 generic/651 generic/652 generic/653 generic/654 generic/655 generic/656 generic/657 generic/658 generic/659
Not run: generic/640 generic/641 generic/642 generic/643 generic/644 generic/645 generic/646 generic/648 generic/649 generic/651 generic/652 generic/653 generic/654 generic/655 generic/656 generic/657 generic/658 generic/659
Failures: generic/647
Failed 1 of 19 tests


If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <yujie.liu@intel.com>
| Link: https://lore.kernel.org/oe-lkp/202212081428.9121071b-yujie.liu@intel.com


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.


-- 
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https://01.org/lkp