Re: Clock jumped 50 minutes in dom0 caused incorrect 2008 R2 domU time

[Mark Adams <mark@campbell-lange.net>]

Hi,

I can try this, but can you please confirm what these options do?

Regards,
Mark

On Sat, Oct 09, 2010 at 10:15:20AM +0800, wei song wrote:
>  added timer_mode =2  and tsc_mode = 1 and viridian=1 into your configure
> file.
> 
> thanks,
> James Song
> 2010/10/8 Mark Adams <mark@campbell-lange.net>
> 
> > Hi,
> >
> > My hardware is stable otherwise. I haven't had any issues for months
> > before, and ever since, and another server with IDENTICAL setup and
> > hardware did not have the issue at the same time.
> >
> > Where should those settings be added?
> >
> > Regards,
> > Mark
> >
> > On Fri, Oct 08, 2010 at 10:15:59AM +0800, wei song wrote:
> > > What's your setting of timer_mode and tsc_mode? If your hardware is not
> > > stable, pls try timer_mode =2  and tsc_mode = 1 and viridian=1.
> > >
> > > -James Song
> > > 2010/10/6 Mark Adams <mark@campbell-lange.net>
> > >
> > > > Hi Xen-Devel's
> > > >
> > > > Please see my note below regarding a serious issue where my clock
> > jumped
> > > > in dom0. I'm sending this through to the devel list as I haven't
> > managed
> > > > to glean any clear help from xen-users and the debian bug team are
> > > > unsure what could have caused this.
> > > >
> > > > Can you confirm if the kernel or xen controls the clock in dom0? I also
> > > > understand that this could be an underlying hardware issue but I have
> > > > another system on exactly the same hardware which hasn't had this
> > occur.
> > > >
> > > > Any advice on how to investigate further or ensure better clock
> > > > stability across dom0 and domU would be appreciated.
> > > >
> > > > Also is it correct behaviour for Xen to reboot an 2008 R2 HVM domU if
> > > > the time moves this much? My guess is that the domU crashed when the
> > > > time changed, and was thus rebooted automatically. Strangely the
> > Windows
> > > > 2003 server didn't get rebooted.
> > > >
> > > > If you need any more info to help please let me know.
> > > >
> > > > Thanks,
> > > > Mark
> > > >
> > > >
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> >
> > --
> > Mark Adams
> > Technical Manager
> > mark@campbell-lange.net
> > .
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