From: Peter Lieven <pl@kamp.de>
To: Vadim Rozenfeld <vrozenfe@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Occasional clockjump in Win2012 after Live Migration
Date: Fri, 13 Dec 2013 13:55:52 +0100 [thread overview]
Message-ID: <52AB03D8.2010505@kamp.de> (raw)
In-Reply-To: <1386939199.27116.32.camel@localhost>
Am 13.12.2013 13:53, schrieb Vadim Rozenfeld:
> On Fri, 2013-12-13 at 12:50 +0100, Peter Lieven wrote:
>> Am 13.12.2013 11:10, schrieb Vadim Rozenfeld:
>>> On Fri, 2013-12-13 at 09:27 +0100, Peter Lieven wrote:
>>>> Am 13.12.2013 05:12, schrieb Vadim Rozenfeld:
>>>>> Does your VM belong to domain or workgroup?
>>>> We had 2 vServers where this happened. One was a Domain Controller and the second was an independent Workgroup Server.
>>>>
>>>> Do you have evidence how the DateTime Clock is driven in Windows 2012?
>>> Should be CMOS periodic timer.
>> you mean the RTC?
> Right.
>> Ok, so if there is a huge clock jump this one must have got messed up?
> It might be. We have seen some similar problem during WHQL testing some
> time ago. The problem happened because time on the host was not set
> correct. So guest was taking this wrong time on boot and then it was a
> big jump after resync with domain controller.
our system forbids starting of vservers on a host where the time is not synched. ;-)
the big jump i see seems to be introduced by the live migration. i will investigate further.
Peter
prev parent reply other threads:[~2013-12-13 12:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-12 16:03 [Qemu-devel] Occasional clockjump in Win2012 after Live Migration Peter Lieven
2013-12-13 4:12 ` Vadim Rozenfeld
2013-12-13 8:27 ` Peter Lieven
2013-12-13 10:10 ` Vadim Rozenfeld
2013-12-13 11:50 ` Peter Lieven
2013-12-13 12:53 ` Vadim Rozenfeld
2013-12-13 12:55 ` Peter Lieven [this message]
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