I want to add this log messages in kern.log Sep 30 23:21:12 xen-p01 kernel: [104363.072636] Clocksource tsc unstable (delta = -811538939738 ns) Sep 30 23:21:13 xen-p01 kernel: [104363.189879] [<ffffffff8105b6e0>] ? run_timer_softirq+0x196/0x268