Thanks for reporting this bug. The 'kvm' package shouldn't really exist. The bug you're referring to is in the kernel kvm code, so I'm marking it as affecting the kernel. (If it were in the userspace qemu package, then the 'qemu' package would be the right bug target).
** Package changed: kvm (Ubuntu) => linux (Ubuntu) -- 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/1567167 Title: Ubuntu 15.10: tsc_offset is error for hot-plugged vcpu. Status in linux package in Ubuntu: New Bug description: 1. when hot plug vcpu, KVM will call kvm_write_tsc set the new vcpu's tsc_offset to host tsc. The new vcpu's tsc_offsets is greatly different from preallocated vcpu's tsc_offset. 2. For redhat 6.x, the vm will show warning and turn off TSC clock. kernel: CPU 1 got hotplugged kernel: kvm-clock: cpu 1, msr 0:282367c1, secondary cpu clock kernel: TSC synchronization [CPU#0 -> CPU#1]: kernel: Measured 150076598781 cycles TSC warp between CPUs, turning off TSC clock. kernel: Marking TSC unstable due to check_tsc_sync_source failed 3. I think should set the new vcpu's tsc_offset to kvm->arch.cur_tsc_offset. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1567167/+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
