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[AlainKnaff <666828@xxxxxxxxxxxxxxxxxx>]

Just saw this one as well today, on a 12.04.5 with a 3.13 kernel

Ssh, and serial console were unresponsive.

Console displayed message about jbd2 being blocked for more than 120
seconds, and then loads of other processes (apache2) blocked for 120
seconds as well (but jbd2 was the first such message chronologically)

Scrolling up and down virtual console worked.

Changing virtual consoles worked as well, login prompts were displayed
on the other virtual consoles, but after entering user name and pressing
return there would just hang (no output, apart user name itself)

After reboot (by killing the kvm process handling this virtual machine),
logfiles showed a bunch of NUL characters (^@) before the reboot
messages, and last message before these NULs was approx 2 hours before
the crash.

We've been running this virtual machine for a while, and this is the
first time this happened.

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https://bugs.launchpad.net/bugs/666828

Title:
  task jbd2/cciss!c0d0:258 blocked for more than 120 seconds

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Lucid:
  Fix Released
Status in linux source package in Maverick:
  Fix Released
Status in linux source package in Natty:
  Fix Released

Bug description:
  Machine became unreachble via ssh. Logging in via the console switch we saw
  task jbd2/cciss!c0d0:258 blocked for more than 120 seconds

  The machine was completely unresponsive, all I could do was scroll up
  and down. ctrl-alt-del wouldn't work.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: linux-image-server 2.6.35.22.23
  Regression: Yes
  Reproducible: No
  ProcVersionSignature: Ubuntu 2.6.35-22.35-server 2.6.35.4
  Uname: Linux 2.6.35-22-server x86_64
  AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory
  AplayDevices: Error: [Errno 2] No such file or directory
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  Date: Tue Oct 26 17:03:00 2010
  Frequency: Once every few days.
  InstallationMedia: Ubuntu-Server 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.2)
  Lsusb:
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: HP ProLiant DL360 G4
  PciMultimedia:
   
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-server root=UUID=4cc50c45-22ab-445d-a812-bd88e377aa86 ro noquiet panic=30
  ProcEnviron:
   PATH=(custom, no user)
   LANG=C
   SHELL=/bin/tcsh
  SourcePackage: linux
  dmi.bios.date: 04/14/2005
  dmi.bios.vendor: HP
  dmi.bios.version: P52
  dmi.chassis.type: 23
  dmi.chassis.vendor: HP
  dmi.modalias: dmi:bvnHP:bvrP52:bd04/14/2005:svnHP:pnProLiantDL360G4:pvr:cvnHP:ct23:cvr:
  dmi.product.name: ProLiant DL360 G4
  dmi.sys.vendor: HP

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