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. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/666828/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
