[Bug 1170911] Re: "mount: / is busy" error during shutdown (not network-manager)

[Steve Dodd]

The patch from bug #1169614 has removed dhclient's lease file from the
list of files open for writing at the end of runlevel 0 for me. upstart
still has a log file for ureadahead open, though..

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https://bugs.launchpad.net/bugs/1170911

Title:
  "mount: / is busy" error during shutdown (not network-manager)

Status in “sysvinit” package in Ubuntu:
  Confirmed

Bug description:
  When I halt Ubuntu ugly (but probably harmless) error messages about
  unmounting several filesystems (including the root) are displayed or
  the screen.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: mountall 2.48build1
  ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
  Uname: Linux 3.8.0-19-generic i686
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: i386
  Date: Sat Apr 20 11:08:07 2013
  InstallationDate: Installed on 2013-02-05 (73 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20130205)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: mountall
  UpgradeStatus: No upgrade log present (probably fresh install)

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