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

** Also affects: linux-kvm (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** No longer affects: linux-kvm (Ubuntu Xenial)

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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1760636

Title:
  ubuntu_blktrace_smoke_test failed with 4.4 / 4.15 kvm kernel

Status in ubuntu-kernel-tests:
  Fix Released
Status in linux-kvm package in Ubuntu:
  Won't Fix

Bug description:
  The test failed with:
    FAILED (CONFIG_BLK_DEV_IO_TRACE=y in /boot/config-4.4.0-1019-kvm)
    FAILED (/sys/kernel/debug/tracing does not exist)

  
  Steps to reproduce:
    Deploy the node with Xenial 4.4 kernel, install linux-kvm
    sudo apt-get install python-minimal
    git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest-client-tests -b master-next
    git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest
    rm -fr autotest/client/tests
    ln -sf ~/autotest-client-tests autotest/client/tests
    AUTOTEST_PATH=/home/ubuntu/autotest sudo -E autotest/client/autotest-local --verbose autotest/client/tests/ubuntu_blktrace_smoke_test/control

  Output:
    https://pastebin.ubuntu.com/p/QY2dKcSybD/

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-1019-kvm 4.4.0-1019.24
  ProcVersionSignature: User Name 4.4.0-1019.24-kvm 4.4.98
  Uname: Linux 4.4.0-1019-kvm x86_64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  Date: Mon Apr  2 16:07:26 2018
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-kvm
  UpgradeStatus: No upgrade log present (probably fresh install)

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