Why is live migration slower after updating a KVM host from RHEL6.2 to RHEL6.3 ?

Solution Unverified - Updated -

Issue

Live migration of KVM virtual machines may appear to be slower after upgrading a KVM host from Red Hat Enterprise Linux 6.2 to 6.3. This issue can be observed if the default maximum migration bandwidth is used.

Environment

  • Red Hat Enterprise Linux 6.3
  • KVM live migration with default maximum migration bandwidth

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