OK, its not related to the eager fpu stuff. Just reproduced the same lockup with a test kernel that contained some potential fixes from upstream. The interesting part of the backtraces is that the EIP is changing and often not in a function that should be able to block. So something seems to cause the __vcpu_run (called by kvm_arch_vcpu_ioctl_run) to spin in a relatively busy loop without ever exiting. The failed RDMSR most likely is harmless. Checking next what that "zapping shadow pages" might tell us. Does anybody recall when (which kernel) this worked last on i386?
-- 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