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** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1729878

Title:
  stress-ng triggering call-traces on s390x z/VM instances

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  During regression testing on a z/VM instance, I noticed call traces
  being dumped to dmesg that seem to be related to stress-ng.

  The stress-ng invocation we're using is:
  stress-ng --aggressive --verify --timeout $runtime \
                                   --metrics-brief --tz --times \
                                   --af-alg 0 --bsearch 0 --context 0 --cpu 0 \
                                   --crypt 0 --hsearch 0 --longjmp 0 --lsearch 
0 \
                                   --matrix 0 --qsort 0 --str 0 --stream 0 \
                                   --tsearch 0 --vecmath 0 --wcs 0

  as executed by the cpu_stress script from the cpu/cpu_stress_ng test
  in the certification suite.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: linux-image-4.13.0-16-generic 4.13.0-16.19
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic s390x
  AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 
2: ls: cannot access '/dev/snd/': No such file or directory
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.7-0ubuntu3.1
  Architecture: s390x
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 
'arecord'
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 
not found.
  Date: Fri Nov  3 11:12:04 2017
  HibernationDevice: RESUME=UUID=1ce0f037-449a-43a1-af49-e730f6f99ac4
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  Lspci:
   
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  PciMultimedia:
   
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=C
   SHELL=/bin/bash
  ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
  ProcKernelCmdLine: root=/dev/mapper/hwe0008_vg-lv crashkernel=196M 
BOOT_IMAGE=0
  RelatedPackageVersions:
   linux-restricted-modules-4.13.0-16-generic N/A
   linux-backports-modules-4.13.0-16-generic  N/A
   linux-firmware                             1.169
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  SourcePackage: linux
  UpgradeStatus: Upgraded to artful on 2017-11-02 (0 days ago)

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