[Bug 616287] Re: umountfs doesn't cleanly unmount / on reboot

[Clint Byrum]

If one creates a python script like this:


#!/usr/bin/python

import signal
import time
import sys
import tempfile

def term_handler(signum, frame):
        time.sleep(15)
        sys.exit(0)

signal.signal(signal.SIGTERM, term_handler)

t=tempfile.TemporaryFile(mode='w')

while time.sleep(3600):
        pass


And runs it with a job file like this (sudo start test after creating the file below)

# /etc/init/test.conf
stop on runlevel [016]

kill timeout 30

exec /path/to/test.py


With the current initscripts version, one will get orphaned inodes because the deleted tempfile was left open on reboot.

With the new version just uploaded (2.87dsf-4ubuntu25) the system should
boot cleanly as the partially stopped process will have been killed off.

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https://bugs.launchpad.net/bugs/616287

Title:
  umountfs doesn't cleanly unmount / on reboot

Status in “mountall” package in Ubuntu:
  Confirmed
Status in “sysvinit” package in Ubuntu:
  Fix Released

Bug description:
  Binary package hint: initscripts

  Sometimes (ca. 50% of cases) when rebooting or turning off the
  computer, the console shows shortly before shutting down (analogous;
  plymouth disabled):

  [...]
  unmounting weak filesystems ...
  mount: / is busy
  [...]

  At next reboot, my root filesystem is recognised as needing recovery, e.g.:
  [    2.720951] EXT4-fs (sda5): INFO: recovery required on readonly filesystem
  [    2.721033] EXT4-fs (sda5): write access will be enabled during recovery
  [    4.925307] EXT4-fs (sda5): orphan cleanup on readonly fs
  [    4.939550] EXT4-fs (sda5): ext4_orphan_cleanup: deleting unreferenced inode 16472
  [    4.952641] EXT4-fs (sda5): 1 orphan inode deleted
  [    4.952696] EXT4-fs (sda5): recovery complete
  [    5.717403] EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null)

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: initscripts 2.87dsf-4ubuntu17
  ProcVersionSignature: Ubuntu 2.6.35-14.20-generic 2.6.35
  Uname: Linux 2.6.35-14-generic i686
  Architecture: i386
  Date: Wed Aug 11 12:17:27 2010
  ProcEnviron:
   LANGUAGE=en_GB:en_US:en
   PATH=(custom, no user)
   LANG=de_DE.utf8
   SHELL=/bin/bash
  SourcePackage: sysvinit