[Bug 1073433] Re: Ext4 corruption associated with shutdown of Ubuntu 12.10

Wed Apr 17 06:44:03 UTC 2013

Steve, thanks for the info.
As I've mentioned earlier, I'm using autofs. I think that such names like 'tmp/autoXXXXX' are autofs temporary mount points. Also I have /tmp mounted as tmpfs.
So my guess is that tmpfs is getting unmounted BEFORE autofs daemon have been terminated (unmounted it's mountpoints). So that autofs mount points can't be unmounted (because they were left on old /tmp with tmpfs).

Now starting and stopping of services in Ubuntu not always works as it is expected. Earlier when services got started from /etc/init.d it was slow but predictable. Services have been launched one by one.
What is really going on now?.. Looks like no one really knows. Sometimes it looks like that all this stuff is launched asynchronously (simultaneously) and in background. Some kind of unpredictable hell, full of 'race conditions'. And if you don't see it that doesn't mean that this is not exist.
For me it's like playing with fire. Today you have won... But tomorrow you can burn.
For an example, I've seen a lot of times, when I do 'restart service_name' command I'm getting almost immediately output to console that service have been restarted. But meanwhile, when I've tried to connect to that service it wasn't ready! It is still being launched/restarted!
So why do I get output to the console, that the service have been restarted when in fact it still DOESN'T?

I'm just suspecting that the problem with 'busy' can be even deeper than
I thought...

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https://bugs.launchpad.net/bugs/1073433

Title:
  Ext4 corruption associated with shutdown of Ubuntu 12.10

Status in Upstart:
  Confirmed
Status in “linux” package in Ubuntu:
  Incomplete
Status in “network-manager” package in Ubuntu:
  Triaged
Status in “upstart” package in Ubuntu:
  Confirmed

Bug description:
  1. Format and label a target Ext4 partion using Ubuntu 12.04
  2. Install 64bit 12.10 OS using that target without reformatting it
  3. Shut down 
  4. Boot an alternate copy of Ubuntu
  5. Restart selecting the newly installed OS
  6. Login then shutdown
  6. Boot an alternate copy of Ubuntu
  7.Fsck the newly installed OS allowing corrections to be made

  Each time the the newly installed OS is executed and then shutdown,
  even if execution only consists of logging on, a subsequent fsck will
  FAIL.

  I used Acronis True Image Home 2013 to create an image of the newly
  installed 64-bit Ubuntu 12.10, so I can recreate the symptoms of Ext4
  filesystem corruption 100% of the time by restoring from the image,
  booting, logging on and shutting down.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-17-generic 3.5.0-17.28
  ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
  Uname: Linux 3.5.0-17-generic x86_64
  ApportVersion: 2.6.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  aguru      1871 F.... pulseaudio
   /dev/snd/controlC0:  aguru      1871 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Tue Oct 30 22:24:54 2012
  HibernationDevice: RESUME=UUID=f22e3fa5-c5c5-41f1-ae5a-49390547cb67
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  IwConfig:
   eth0      no wireless extensions.

   lo        no wireless extensions.
  MachineType: System manufacturer P5Q-E
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic root=UUID=ef2c78d5-783a-422a-88f7-27ec09dda0d1 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-17-generic N/A
   linux-backports-modules-3.5.0-17-generic  N/A
   linux-firmware                            1.95
  RfKill:

  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/06/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2101
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P5Q-E
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2101:bd04/06/2009:svnSystemmanufacturer:pnP5Q-E:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5Q-E:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: P5Q-E
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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