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[Launchpad Bug Tracker <1727251@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package lttng-modules - 2.8.0-1ubuntu1~16.04.3

---------------
lttng-modules (2.8.0-1ubuntu1~16.04.3) xenial; urgency=medium

  * Fix builds on HWE 4.13 kernel (LP: #1727251)
    Apply the following upstream commits:
     0015-Fix-update-mm_vmscan-instrumentation-for-kernel-4.11.patch
     0016-Fix-update-btrfs-instrumentation-for-kernel-4.11.patch
     0017-Fix-changes-to-the-vm_op-fault-cb-prototype-in-libri.patch
     0018-Fix-update-scsi-instrumentation-for-kernel-4.11.patch
     0019-Fix-timers-cputime_t-arguments-replaced-by-ull-in-ke.patch
     0020-Fix-atomic_add_unless-returns-true-false-rather-than.patch
     0021-Fix-kref-changes-for-kernel-4.11.patch
     0022-Fix-update-sched-instrumentation-for-kernel-4.12.patch
     0023-Fix-update-ringbuffer-for-kernel-4.12.patch
     0024-Fix-update-block-instrumentation-for-kernel-4.12.patch
     0025-Fix-update-ftrace-probe-for-kernel-4.12.patch
     0026-Fix-Build-ftrace-probe-on-kernels-prior-to-4.12.patch
     0027-Fix-handle-missing-ftrace-header-on-v4.12.patch
     0028-Fix-section-mismatch-warning-caused-by-__exit-annota.patch
     0029-Fix-missing-ftrace-header-on-v4.11.patch
  * Don't build ftrace lttng module for 4.11 upwards as this currently
    requires the full kernel source and not just the headers anymore,
    add kernel version check in lttng-modules-dkms.dkms.in

 -- Colin Ian King <colin.king@xxxxxxxxxxxxx>  Thu, 26 Oct 2017 18:00:02
+0100

** Changed in: lttng-modules (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1727251

Title:
  ubuntu_lttng_smoke_test failed on A-hwe kernel

Status in lttng-modules package in Ubuntu:
  Fix Released
Status in lttng-modules source package in Xenial:
  Fix Released

Bug description:
  [SRU lttng-modules-dkms XENIAL for 4.13 kernel support]

  lttng fails to build because of API changes in 4.13.

  [FIX]

  Apply the following upstream lttng commits for 4.11, 4.12 compat
  fixes:

  Fix-update-mm_vmscan-instrumentation-for-kernel-4.11.patch
  Fix-update-btrfs-instrumentation-for-kernel-4.11.patch
  Fix-changes-to-the-vm_op-fault-cb-prototype-in-libri.patch
  Fix-update-scsi-instrumentation-for-kernel-4.11.patch
  Fix-timers-cputime_t-arguments-replaced-by-ull-in-ke.patch
  Fix-atomic_add_unless-returns-true-false-rather-than.patch
  Fix-kref-changes-for-kernel-4.11.patch
  Fix-update-sched-instrumentation-for-kernel-4.12.patch
  Fix-update-ringbuffer-for-kernel-4.12.patch
  Fix-update-block-instrumentation-for-kernel-4.12.patch
  Fix-update-ftrace-probe-for-kernel-4.12.patch
  Fix-Build-ftrace-probe-on-kernels-prior-to-4.12.patch
  Fix-handle-missing-ftrace-header-on-v4.12.patch
  Fix-section-mismatch-warning-caused-by-__exit-annota.patch
  Fix-missing-ftrace-header-on-v4.11.patch

  Also: Don't build ftrace lttng module for 4.11 upwards as this currently
  requires the full kernel source and not just the headers anymore,
  add kernel version check in lttng-modules-dkms.dkms.in

  [TEST]
  from kernel team autotests:

  sudo autotest/client/autotest-local
  autotest/client/tests/ubuntu_lttng_smoke_test/control

  Without the fixes, these will fail.  With the fixes, the regression
  tests pass.  Run this 4.4, 4.8 and 4.13-hwe kernels, must pass on all
  three kernel versions.

  [REGRESSION POTENTIAL]
  This affects just the lttng tools.  Could break pre-4.13 older kernels, so needs regression checking on supported kernel versions.

  -------------------------------

  Kernel 4.13.0-16.19~16.04.3

  4 tests failed for the ubuntu_lttng_smoke_test with amd64 / arm64 / i386 / ppc64le systems:
   == lttng smoke test of session create/destroy ==
   Session test-kernel-session created.
   Traces will be written in /tmp/lttng-kernel-trace-21869-session
   PASSED (lttng create)
   Session test-kernel-session destroyed
   PASSED (lttng destroy)

   == lttng smoke test list kernel events ==
   Error: Unable to list kernel events: Kernel tracer not available
   Error: Command error
   FAILED (lttng list --kernel)
   FAILED (lttng list --kernel more output expected)

   == lttng smoke test trace open/close system calls ==
   Session test-kernel-session created.
   Traces will be written in /tmp/lttng-kernel-trace-21869-session
   PASSED (lttng create)
   Error: Event open: Kernel tracer not available (channel channel0, session test-kernel-session)
   Error: Event openat: Kernel tracer not available (channel channel0, session test-kernel-session)
   Error: Event close: Kernel tracer not available (channel channel0, session test-kernel-session)
   FAILED (lttng enable-event)
   Session test-kernel-session destroyed

   == lttng smoke test trace context switches ==
   Session test-kernel-session created.
   Traces will be written in /tmp/lttng-kernel-trace-21869-session
   PASSED (lttng create)
   Error: Event sched_switch: Kernel tracer not available (channel channel0, session test-kernel-session)
   FAILED (lttng enable-event)

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