https://bugzilla.kernel.org/show_bug.cgi?id=92291 Bug ID: 92291 Summary: kvm/guest crashes when smp > 1 with AMD FX8300; with host kernel oops from abrt as well Product: Virtualization Version: unspecified Kernel Version: 3.18.3-201.fc21.x86_64 [host], 3.13.0-39-generic [ubuntu guest] Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: kernelbugzilla.org.Markie1@xxxxxxxx Regression: No Created attachment 165171 --> https://bugzilla.kernel.org/attachment.cgi?id=165171&action=edit kvm register dumps Overview ======== Whenever I launch a kvm guest in qemu-system-x86_64 with -smp > 1 [-cpu host -enable-kvm of course], the guest kernel crashes at some stage; I've seen the kernel crash before completing boot-up, giving the recognizable kernel crash trace, as well as during 'normal' operation when the guest simply 'freezes'. The host kernel gives me an oops as well, although abrt won't let me report it now as I've got Nvidia proprietary drivers 'tainting' the kernel The bug seems non-specific to guest OS, though mainly it's been *buntu guests, with various different kernels including lowlatency, I even think I've seen the bug with a Windows guest. I've tried building qemu from git sources, no particularly noticeable difference; Steps to reproduce ================== 1) Start linux guest on a multicore system [AMD FX8* series CPU?] with $ qemu-system-x86_64 -m 2G -cpu host -smp 4 -enable-kvm -hda [image_file] -vga vmware 2) wait until the guest kernel crashes; virtually every time in less than 10 minutes Actual results ============== guest kernel crashes, host kernel gives an oops too, presumably as a result of kvm passthrough Expected results ================ guest virtual machine should work normally then keep working normally it would be good to try to pipe dmesg from the guest to the host serial connection, in case that would assist? -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
