<div> </div><div> </div><div>11.04.2013, 02:01, "Van" &lt;van-1@yandex.ru&gt;:</div><blockquote type="cite"><div> </div><div> </div><div>11.04.2013, 01:05, "David Young" &lt;<a href="mailto:david@prophecy.net.nz">david@prophecy.net.nz</a>&gt;:</div><blockquote type="cite"><tt>Hi all,</tt><tt><br /> </tt><tt><br /> </tt><tt>We recently upgrade from CentOS 5.8 to CentOS 5.9 on kernel-xen-2.6.18-348.3.1.el5, and after booting into the new kernel, noted large amounts of these messages every second or so in the logs:</tt><tt><br /> </tt><tt><br /> </tt> <tt><span style="color:#000000;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;line-height:normal;text-align:start;text-transform:none;background-color:#cacaca;display:inline !important;float:none;">Mar 30 21:38:35 atlas2 kernel: Warning Timer ISR/0: Time went backwards: delta=-<span><span>1393683849</span></span> delta_cpu=<span><span>22316151</span></span> shadow=<span><span>225003685197135</span></span> off=<span><span>129240997</span></span> processed=<span><span>225005208029053</span></span> cpu_processed=<span><span>225003792029053</span></span></span></tt><tt><br /> </tt><tt></tt><tt><br /> </tt><tt><span style="color:#000000;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;line-height:normal;text-align:start;text-transform:none;background-color:#cacaca;display:inline !important;float:none;">On both the dom0 and the domUs.</span></tt><tt><br /> </tt><tt></tt><tt><br /> </tt><tt><span style="color:#000000;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;line-height:normal;text-align:start;text-transform:none;background-color:#cacaca;display:inline !important;float:none;">Some reading indicates that this _was_ a fault fixed in 2009/2010, but it seems to have resurfaced on the latest kernel.</span></tt><tt><br /> </tt><tt></tt><tt><br /> </tt><tt><span style="color:#000000;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;line-height:normal;text-align:start;text-transform:none;background-color:#cacaca;display:inline !important;float:none;">For now, we've reverted back to an earlier kernel.</span></tt><tt><br /> </tt><tt></tt><tt><br /> </tt><tt><span style="color:#000000;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;line-height:normal;text-align:start;text-transform:none;background-color:#cacaca;display:inline !important;float:none;">Has anybody else seen this recently, or got any insight?</span></tt><tt><br /> </tt><tt></tt><tt><br /> </tt><tt><span style="color:#000000;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;line-height:normal;text-align:start;text-transform:none;background-color:#cacaca;display:inline !important;float:none;">Thanks,</span></tt><tt><br /> </tt><tt><span style="color:#000000;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;line-height:normal;text-align:start;text-transform:none;background-color:#cacaca;display:inline !important;float:none;">David</span></tt><br /> <br /> <br /> ,<p>_______________________________________________<br />CentOS-virt mailing list<br /><a href="mailto:CentOS-virt@centos.org">CentOS-virt@centos.org</a><br /><a href="http://lists.centos.org/mailman/listinfo/centos-virt">http://lists.centos.org/mailman/listinfo/centos-virt</a></p></blockquote><div>Hi. <span>not enough about your configuration(dmsg, xm dmsg, hardware, etc). Maybe your system clock runs very fast and any service(for example ntp) goes backwards system time.<br /></span></div><div>I have found several links about your question:</div><div><a href="http://forums.citrix.com/thread.jspa?threadID=273454&amp;start=0&amp;tstart=0">http://forums.citrix.com/thread.jspa?threadID=273454&amp;start=0&amp;tstart=0</a></div><div><a href="http://support.citrix.com/article/CTX128034">http://support.citrix.com/article/CTX128034</a></div><div>-- <br />Трудно жить ничего не делая, но мы привыкли бороться с трудностями.</div>,<p>_______________________________________________<br />CentOS-virt mailing list<br /><a href="mailto:CentOS-virt@centos.org">CentOS-virt@centos.org</a><br /><a href="http://lists.centos.org/mailman/listinfo/centos-virt">http://lists.centos.org/mailman/listinfo/centos-virt</a></p></blockquote><div>and look at this article. It looks like OS looses track of time.</div><div> </div><div>-- <br />Трудно жить ничего не делая, но мы привыкли бороться с трудностями.</div>