I've had a number of lockups in the last 2 days since upgrading to Trusty and trying to run a VM under kvm which look to match this issue.
System appears to become unresponsive/hang with what looks like some kind of I/O lockup, cannot ls in a terminal etc before eventually display freezes. syslog shows kernel spew related to soft lockup after this point though. The issue appeared to coincide with a period of high disk I/O within the guest on both occasions. I'll look to reproduce on a less active guest outside of working day. This occured on a 64 bit system: lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Trusty Tahr (development branch) Release: 14.04 Codename: trusty uname -a Linux moon127-pcsubu 3.13.0-12-generic #32-Ubuntu SMP Fri Feb 21 17:45:10 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux ** Attachment added: "syslog/kernel log of lockup" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1268906/+attachment/3999385/+files/soft-lockup-syslog.txt -- 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/1268906 Title: cpu soft lockup running kvm Status in “linux” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: Ran twice - first time running kvm killed my system. The second time, I just got lots of kernel oops messages in dmesg. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-2-generic 3.13.0-2.17 ProcVersionSignature: Ubuntu 3.13.0-2.17-generic 3.13.0-rc7 Uname: Linux 3.13.0-2-generic i686 NonfreeKernelModules: nvidia ApportVersion: 2.13.1-0ubuntu1 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: james 3250 F.... pulseaudio /dev/snd/controlC0: james 3250 F.... pulseaudio /dev/snd/pcmC0D0p: james 3250 F...m pulseaudio CurrentDesktop: Unity Date: Tue Jan 14 10:29:20 2014 HibernationDevice: RESUME=UUID=67e3cd44-242b-4bbf-918b-28fff81e0312 InstallationDate: Installed on 2010-10-21 (1181 days ago) InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007) MachineType: LENOVO 2516CTO ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-2-generic root=UUID=7ad192e9-7b26-49d1-8e1c-fefc7dc495cb ro quiet splash RelatedPackageVersions: linux-restricted-modules-3.13.0-2-generic N/A linux-backports-modules-3.13.0-2-generic N/A linux-firmware 1.121 SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2013-11-01 (73 days ago) dmi.bios.date: 08/27/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 6IET72WW (1.32 ) dmi.board.name: 2516CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6IET72WW(1.32):bd08/27/2010:svnLENOVO:pn2516CTO:pvrThinkPadT410:rvnLENOVO:rn2516CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2516CTO dmi.product.version: ThinkPad T410 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1268906/+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
