After migration guest shows error message: "Clocksource tsc unstable (delta = 125002555 ns). Enable clocksource failover by adding clocksource_failover kernel parameter"

Solution Unverified - Updated -

Issue

  • After migrating a guest shows the following message in the logs:
Clocksource tsc unstable (delta = 125002555 ns).  Enable clocksource failover by adding clocksource_failover kernel parameter.

Environment

  • Xen or Red Hat Enterprise virtualization (RHEV) or Microsoft Hyper-V.
  • Source and destination hosts of a live migration have non-identical CPUs.
  • Guest VM: Red Hat Enterprise Linux 6 running kernel version 2.6.32-358.23.2.el6 or earlier.

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