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Re: [Xen-devel] Re: [BUG 1282] time jump on live migrate root cause & proposed fixes


  • To: Rik van Riel <riel@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Thu, 07 Aug 2008 11:25:34 +0100
  • Cc:
  • Delivery-date: Thu, 07 Aug 2008 03:26:02 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acj4Wte4FgSzyGROEd2j9wAWy6hiGQAHRU2m
  • Thread-topic: [Xen-devel] Re: [BUG 1282] time jump on live migrate root cause & proposed fixes

On 7/8/08 07:57, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote:

> On 7/8/08 03:00, "Rik van Riel" <riel@xxxxxxxxxx> wrote:
> 
>> The reason is that wc_sec + wc_nsec + system_timestamp
>> should always be the same across multiple systems, since
>> this equals system boot time + uptime.
>> 
>> 
>> Does anybody know why a save/restore or a live migrate
>> would mess things up?
> 
> I'll have a poke around the code today.

It does look like the code should work. What kernel specifically have you
reproduced this behaviour with?

 -- Keir



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