This bug has been copied from bug #592021 and has been proposed
to be backported to 5.5 z-stream (EUS).
according to 592021#c3, verified patch included in kvm-83-164.el5_5.10
for sanity testing :
start 16 guest on 4 cores host, didn't observe large offset(less than 2s) after boot, PASS
setting to verified
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.
*** Bug 596623 has been marked as a duplicate of this bug. ***