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[Bug 1571761] Re: zfs-import-cache.service slows boot by 60 seconds

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1571761@xxxxxxxxxxxxxxxxxx>
Date: Wed, 22 Jun 2016 20:09:16 -0000
Reply-to: Bug 1571761 <1571761@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Branch linked: lp:~smoser/ubuntu/xenial/cloud-init/pkg

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https://bugs.launchpad.net/bugs/1571761

Title:
  zfs-import-cache.service slows boot by 60 seconds

Status in cloud-init package in Ubuntu:
  Fix Released
Status in zfs-linux package in Ubuntu:
  Confirmed

Bug description:
  Fresh uvt-kvm guest, then
  $ sudo apt-get install zfsutils-linux
  $ sudo reboot

  The reboot will show on console waiting for tasks, then after ~ 60 seconds it continues boot.
  Logging in shows:

  $ sudo systemd-analyze critical-chain zfs-mount.service
  The time after the unit is active or started is printed after the "@" character.
  The time the unit takes to start is printed after the "+" character.

  zfs-mount.service +81ms
  └─zfs-import-cache.service @1min 786ms +272ms
    └─systemd-udev-settle.service @494ms +1min 275ms
      └─systemd-udev-trigger.service @415ms +55ms
        └─systemd-udevd-control.socket @260ms
          └─-.mount @124ms
            └─system.slice @129ms
              └─-.slice @124ms

  Seems possibly related / or some discussion at
  https://github.com/zfsonlinux/zfs/issues/2368

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: zfsutils-linux 0.6.5.6-0ubuntu8
  ProcVersionSignature: User Name 4.4.0-18.34-generic 4.4.6
  Uname: Linux 4.4.0-18-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.1-0ubuntu1
  Architecture: amd64
  Date: Mon Apr 18 16:42:35 2016
  ProcEnviron:
   TERM=screen.xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: zfs-linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.sudoers.d.zfs: [deleted]

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