<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Mar 28, 2017 at 1:50 PM, Michal Skrivanek <span dir="ltr"><<a href="mailto:michal.skrivanek@redhat.com" target="_blank">michal.skrivanek@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-"><br>
> On 28 Mar 2017, at 13:41, Jiří Sléžka <<a href="mailto:jiri.slezka@slu.cz">jiri.slezka@slu.cz</a>> wrote:<br>
><br>
> On 03/28/2017 12:34 AM, Jiří Sléžka wrote:<br>
>> Hi all,<br>
>><br>
>> I have just upgraded ovirt manager from 4.1.0 to 4.1.1, then I have<br>
>> upgraded one host. After reboot and activation of this host some vms<br>
>> started to migrate here.<br>
>><br>
>> Some time after migration CPU of this vms go to 100% and vms become<br>
>> unreachable.<br>
>><br>
>> There is /var/log/libvirt/qemu/hypnos.<wbr>log (hypnos is one of this vms)<br>
>> <a href="https://pastebin.com/U30xfBMJ" rel="noreferrer" target="_blank">https://pastebin.com/U30xfBMJ</a><br>
>><br>
>> Powering off and starting again solve this but I would like to have a<br>
>> glue what is happening.<br>
>><br>
>> I suspect this line<br>
>><br>
>> 2017-03-27T22:09:23.746710Z qemu-kvm: warning: TSC frequency mismatch<br>
>> between VM (2600031 kHz) and host (2100024 kHz), and TSC scaling unavailable<br>
>><br>
>> Original host uses "AMD Opteron(TM) Processor 6238" with "cpu MHz:<br>
>> 2600.113" and upgraded host uses "AMD Opteron(tm) Processor 6172" with<br>
>> "cpu MHz: 2100.097".<br>
><br>
> It looks like it isn't problem with 4.1.1 at all.<br>
><br>
> There is just missing tsc_scale cpu flag on our older AMD CPUs...<br>
><br>
> <a href="http://unix.stackexchange.com/questions/296636/100-cpu-utilisation-and-hang-after-virsh-migrate" rel="noreferrer" target="_blank">http://unix.stackexchange.com/<wbr>questions/296636/100-cpu-<wbr>utilisation-and-hang-after-<wbr>virsh-migrate</a><br>
><br>
> This is probably unsolvable hw problem, right?<br>
<br>
</span>And this is without host-model CPU type?<br>
That 6172 should be Opteron G3…is that what you have set in your Cluster?<br>
<br>
Thanks,<br>
michal<br>
<div class="gmail-HOEnZb"><div class="gmail-h5"><br><br></div></div></blockquote><div><br></div><div>Should I care about it too?</div><div>In my case on my AMD hypervisors:</div></div><br></div><div class="gmail_extra"><div class="gmail_extra">[g.cecchi@ovmsrv06 ~]$ cat /proc/cpuinfo | grep tsc_</div><div class="gmail_extra">[g.cecchi@ovmsrv06 ~]$</div></div><div class="gmail_extra"><br></div><div class="gmail_extra"><div class="gmail_extra">model name<span class="gmail-Apple-tab-span" style="white-space:pre"> </span>: Dual-Core AMD Opteron(tm) Processor 8222</div><div>flags<span class="gmail-Apple-tab-span" style="white-space:pre"> </span>: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow art rep_good nopl extd_apicid pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy<br></div><div><br></div><div>The related cluster is set as "AMD Opteron G2"</div><div><br></div><div>Thanks in advance,</div><div>Gianluca</div></div></div>