KVM guests using kvm_clock experience delays in signal handling

Solution Verified - Updated -

Issue

In KVM guests using kvm_clock as the clock source where the guest TSC frequency is > the host TSC frequency experience delays in signal handling associated with timers.

Sometimes the instability is enough that application code notices that expected timers are not firing and complains.

Environment

Red Hat Enterprise Linux (RHEL) 6.3, 6.4

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