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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

** Changed in: ubuntu-kernel-tests
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1809699

Title:
  cpu-hotplug test in ubuntu_kernel_selftest always return 0 on Xenial

Status in ubuntu-kernel-tests:
  Fix Released
Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Xenial:
  Fix Released

Bug description:
  == SRU Justification ==
  This cpu-hotplug test will always return PASSED even if there are some failures there:

  $ sudo make -C linux/tools/testing/selftests TARGETS=cpu-hotplug run_tests
  make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests'
  for TARGET in cpu-hotplug; do \
   make -C $TARGET; \
  done;
  make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/cpu-hotplug'
  make[1]: Nothing to be done for 'all'.
  make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/cpu-hotplug'
  for TARGET in cpu-hotplug; do \
   make -C $TARGET run_tests; \
  done;
  make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/cpu-hotplug'
  pid 25001's current affinity mask: 3
  pid 25001's new affinity mask: 1
  CPU online/offline summary:
    Cpus in online state: 0-1
    Cpus in offline state: 2
  Limited scope test: one hotplug cpu
    (leaves cpu in the original state):
    online to offline to online: cpu 1
    offline to online to offline: cpu 2
  ./cpu-on-off-test.sh: line 78: /sys/devices/system/cpu/cpu2/online: No such file or directory
  online_cpu_expect_success 2: unexpected fail
  ./cpu-on-off-test.sh: line 83: /sys/devices/system/cpu/cpu2/online: No such file or directory
  offline_cpu_expect_success 2: unexpected fail
  selftests: cpu-on-off-test.sh [PASS]
  make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/cpu-hotplug'
  make: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests'

  == Fixes ==
  8fe6e53a8ed5f0 (selftests/cpu-hotplug: exit with failure when test occured unexpected behaviors)

  For newer releases, they already have this patch.
  For Trusty and older release, they will need more work to get this patch.

  == Regression Potential ==
  None, fix for testing tools.

  For Trusty, it's missing another 20 commits to reach 8fe6e53:
  4813d2e736 (tools: memory-hotplug fix unexpected operator error)
  ddddda9bc4 (tools: selftests - create a separate hotplug target for full range test)
  a88cc108f6 (lib: Export interval_tree)
  93e9ef83f4 (test: add minimal module for verification testing)
  3e2a4c183a (test: check copy_to/from_user boundary validation)
  64a8946b44 (net: filter: BPF testsuite)
  7069a97a14 (selftests/net: move test out of Makefile into a shell script)
  3c25fa14f0 (selftests/user: move test out of Makefile into a shell script)
  24fe831c17 (tools/testing/selftests/sysctl: validate sysctl_writes_strict)
  0a8adf5847 (test: add firmware_class loader test)
  6e68e6c5e4 (ftracetest: Initial commit for ftracetest)
  4f5ce5e8d7 (selftests: add memfd_create() + sealing tests)
  c9b26b81af (syscalls: add selftest for execveat(2))
  3ce51050fa (selftest: size: Add size test for Linux kernel) backport with context arrangement
  87b2d44026 (selftests: add memfd/sealing page-pinning tests)
  498b473af9 (tools: selftests: fix build issue with make kselftests target)
  ce6a144a0d (selftests/memfd: Run test on all architectures)
  5e29a9105b (selftests: Introduce minimal shared logic for running tests)
  cc16782169 (selftests: change cpu on-off-test.sh name to be unique)
  8c749ce93e (selftests: create test-specific kconfig fragments)
  8fe6e53a8e (selftests/cpu-hotplug: exit with failure when test occured unexpected behaviors)

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-141-generic 4.4.0-141.167
  ProcVersionSignature: Ubuntu 4.4.0-141.167-generic 4.4.162
  Uname: Linux 4.4.0-141-generic s390x
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  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'
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: s390x
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  CurrentDmesg:

  Date: Mon Dec 24 04:08:18 2018
  HibernationDevice: RESUME=UUID=ca468a9c-9563-442c-85c6-6055e800a66e
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  Lspci:

  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  PciMultimedia:

  ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
  ProcKernelCmdLine: root=UUID=b65b756a-ba4e-4c53-aa32-0db2bdb50bb3 crashkernel=196M
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-141-generic N/A
   linux-backports-modules-4.4.0-141-generic  N/A
   linux-firmware                             1.157.21
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)

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