puppetlabs/puppetlabs-ntp — pull request #19 by hakamadare (2012-05-15 20:02:04+00:00)
Title: (#14497) Add tinker_panic option for ntpd

Automatically sets tinker_panic 0 when $is_virtual is true. This
configuration enables ntpd to cope with large clock skews, such as occur
when a VM guest is suspended and resumed.

More information is available here:

http://www.vmware.com/pdf/vmware_timekeeping.pdf