Can I get access to this hardware to start to debug this issue?

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

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

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https://bugs.launchpad.net/bugs/1753705

Title:
  stress-ng will make an Ubuntu on LPAR s390x Bionic system become very
  slow

Status in linux package in Ubuntu:
  In Progress

Bug description:
  On an Ubuntu on LPAR s390x node, s2lp4, boot with Bionic kernel.

  When trying to run the ubuntu_stress_smoke test on it. This test will cause 
error like:
    
/home/ubuntu/autotest/client/tests/ubuntu_stress_smoke_test/ubuntu_stress_smoke_test.sh:
 fork: retry: Resource temporarily unavailable

  Not sure which test is the cause, but the system will become very slow
  after running this test suite. And it seems that the test suite will
  terminates itself before walking through all the test cases.

  1st run: terminates after the epoll test
  2nd run: crashed and rebooted after the branch test
  3rd run: terminates after the eventfd test
  4th run: terminates after the enosys test

  Command to run the test:
    AUTOTEST_PATH=/home/ubuntu/autotest sudo -E autotest/client/autotest-local 
--verbose autotest/client/tests/ubuntu_stress_smoke_test/control

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-11-generic 4.15.0-11.12
  ProcVersionSignature: Ubuntu 4.15.0-11.12-generic 4.15.5
  Uname: Linux 4.15.0-11-generic s390x
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  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: 2.20.8-0ubuntu10
  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.
  CurrentDmesg:

  Date: Tue Mar  6 09:31:39 2018
  HibernationDevice: RESUME=UUID=e2735dd1-cbbc-4424-9c25-d37d073d9414
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  PciMultimedia:

  ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
  ProcKernelCmdLine: root=UUID=38f7d570-2973-4055-b668-12a9ace1e0c7 
crashkernel=196M BOOT_IMAGE=0
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-11-generic N/A
   linux-backports-modules-4.15.0-11-generic  N/A
   linux-firmware                             1.172
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)

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