System logs show the following message: kernel: Clocksource tsc unstable (delta = xxxx ns). Enable clocksource failover by adding clocksource_failover kernel parameter.

Solution Verified - Updated -

Issue

  • Messages like the following appear in the system logs:
2013-07-16T05:00:05.181538-04:00 xxxxxx kernel: Clocksource tsc unstable (delta = -95170507948 ns).  Enable clocksource failover by adding clocksource_failover kernel parameter.
2013-07-16T05:00:05.181555-04:00 xxxxxx kernel: Clocksource tsc unstable (delta = -51539542975 ns).  Enable clocksource failover by adding clocksource_failover kernel parameter.

Environment

  • Red Hat Enterprise Linux 6 (RHEL)
  • Red Hat Enterprise Linux 5 (RHEL)

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