Re: [Xen-users] Time went backwards in domU after migration

[Takeshi Sone <ts1@xxxxxxxxxx>]

I changed the BIOS setting so both hosts use 1.193MHz PIT,
but it didn't get fixed. 

Takeshi Sone wrote:
> Hello gurus,
>
> I have two physical xen hosts and when I migrate a domU from one host to 
> another, I get many of this error from domU kernel:
> clocksource/0: Time went backwards: delta=-3536123661 shadow=686019823475 
> offset=281887188
>
> Sometimes domU time stalls and network stops working, but other times it
> gets working again.
>
> The two hosts are using different platform timer source:
>
> root@xen1test:~# xm dmesg|grep -i timer
> (XEN) Platform timer is 14.318MHz HPET
>
> root@xen2:~# xm dmesg|grep -i timer
> (XEN) Platform timer is 1.193MHz PIT
>
> Both hosts use Ubuntu Gutsy (latest as of today) packaged version of Xen
> 3.1.0, Linux 2.6.22 (on both dom0 and domU).
>
> Dom0s are working flawlessly.
>
> Thanks in advance,
> Takeshi
>
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