arm64 system failed with test 079 in zfs_xfs_generic

This system constantly fails with the generic test 079 in ubuntu_zfs_xfs_generic test suite, even with the latest code from upstream.

07:59:46 DEBUG| Persistent state client.unexpected_reboot now set to ('ubuntu_zfs_xfs_generic.079', 'ubuntu_zfs_xfs_generic.079')
07:59:46 DEBUG| Waiting for pid 12399 for 3600 seconds
07:59:47 INFO | Running: /home/ubuntu/autotest/client/tests/ubuntu_zfs_xfs_generic/ubuntu_zfs_xfs_generic.sh 079 /home/ubuntu/autotest/client/tmp/ubuntu_zfs_xfs_generic/src
07:59:51 DEBUG| [stdout]
08:00:01 ERROR| Exception escaping from test:
Traceback (most recent call last):
  File "/home/ubuntu/autotest/client/shared/test.py", line 411, in _exec
    _call_test_function(self.execute, *p_args, **p_dargs)
  File "/home/ubuntu/autotest/client/shared/test.py", line 823, in _call_test_function
    return func(*args, **dargs)
  File "/home/ubuntu/autotest/client/shared/test.py", line 291, in execute
    postprocess_profiled_run, args, dargs)
  File "/home/ubuntu/autotest/client/shared/test.py", line 212, in _call_run_once
    self.run_once(*args, **dargs)
  File "/home/ubuntu/autotest/client/tests/ubuntu_zfs_xfs_generic/ubuntu_zfs_xfs_generic.py", line 98, in run_once
    self.results = utils.system_output(cmd, retain_output=True)
  File "/home/ubuntu/autotest/client/shared/utils.py", line 1267, in system_output
    verbose=verbose, args=args).stdout
  File "/home/ubuntu/autotest/client/shared/utils.py", line 918, in run
    "Command returned non-zero exit status")
CmdError: Command </home/ubuntu/autotest/client/tests/ubuntu_zfs_xfs_generic/ubuntu_zfs_xfs_generic.sh 079 /home/ubuntu/autotest/client/tmp/ubuntu_zfs_xfs_generic/src> failed, rc=1, Command returned non-zero exit status
* Command:
    /home/ubuntu/autotest/client/tests/ubuntu_zfs_xfs_generic/ubuntu_zfs_xfs_
    generic.sh 079 /home/ubuntu/autotest/client/tmp/ubuntu_zfs_xfs_generic/src
Exit status: 1
Duration: 13.813601017

stdout:
Creating zfs pool testpool..
Creating zfs file systems test and scratch in testpool..
VDEVs in /home/ubuntu/autotest/client/tmp/ubuntu_zfs_xfs_generic/src
FSTYP -- zfs
PLATFORM -- Linux/aarch64 wright-kernel 4.10.0-38-generic
MKFS_OPTIONS -- testpool/scratch
MOUNT_OPTIONS -- testpool/scratch /mnt/scratch

generic/079 - output mismatch (see /home/ubuntu/autotest/client/tmp/ubuntu_zfs_xfs_generic/src/xfstests-bld/xfstests-dev/results//generic/079.out.bad)
    --- tests/generic/079.out 2017-11-15 07:40:51.054794973 +0000
    +++ /home/ubuntu/autotest/client/tmp/ubuntu_zfs_xfs_generic/src/xfstests-bld/xfstests-dev/results//generic/079.out.bad 2017-11-15 07:59:52.910100549 +0000
    @@ -1,7 +1,6 @@
     QA output created by 079
     *** starting up
    -testing immutable...PASS.
    -testing append-only...PASS.
    -testing immutable as non-root...PASS.
    -testing append-only as non-root...PASS.
    +acl: Function not implemented
    ...
    (Run 'diff -u tests/generic/079.out /home/ubuntu/autotest/client/tmp/ubuntu_zfs_xfs_generic/src/xfstests-bld/xfstests-dev/results//generic/079.out.bad' to see the entire diff)
Ran: generic/079
Failures: generic/079
Failed 1 of 1 tests

Destroying zfs pool testpool
Removing VDEVs in /home/ubuntu/autotest/client/tmp/ubuntu_zfs_xfs_generic/src

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: linux-image-4.10.0-38-generic 4.10.0-38.42
ProcVersionSignature: User Name 4.10.0-38.42-generic 4.10.17
Uname: Linux 4.10.0-38-generic aarch64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Nov 15 03:29 seq
 crw-rw---- 1 root audio 116, 33 Nov 15 03:29 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.4-0ubuntu4.5
Architecture: arm64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDmesg:

Date: Wed Nov 15 06:27:54 2017
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: Cavium ThunderX CRB
PciMultimedia:

ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:
 0 EFI VGA
 1 astdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-38-generic root=UUID=ddcb8b36-6267-4392-a1f9-74d9203b742e ro
RelatedPackageVersions:
 linux-restricted-modules-4.10.0-38-generic N/A
 linux-backports-modules-4.10.0-38-generic N/A
 linux-firmware 1.164.1
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/12/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 5.11
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: To be filled by O.E.M.
dmi.board.vendor: To be filled by O.E.M.
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 0
dmi.chassis.vendor: Cavium
dmi.chassis.version: To be filled by O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd12/12/2012:svnCavium:pnThunderXCRB:pvrTobefilledbyO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnCavium:ct0:cvrTobefilledbyO.E.M.:
dmi.product.name: ThunderX CRB
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Cavium