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Re: [Xen-devel] Wall-Clock-Time-Jump after migration [xen-4.1]

To: Philipp Hahn <hahn@xxxxxxxxxxxxx>, <Xen-devel@xxxxxxxxxxxxx>
From: David Vrabel <david.vrabel@xxxxxxxxxx>
Date: Tue, 16 Feb 2016 16:43:00 +0000
Delivery-date: Tue, 16 Feb 2016 16:43:41 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On 16/02/16 15:38, Philipp Hahn wrote:
> Hello,
> 
> I'm trying to understand Xens implementation of (wall-)clock time and
> observed a strange behaviour:
> 
> Summary: When a Linux-PV-domU is migrated between two hosts, the
> "ntpdate" time jumps.
> 
> Environment: xen-4.1 with linux-3.2 and linux-3.10, ntpdate running in
> all dom[0U].

You might need the following commits in your dom0 kernel, all of which
are in 3.11 and later.

3565184ed0c1ea46bea5b792da5f72a83c43e49b
7c4c3a0f18ba57ea2a2985034532303d2929902a
0eb071651474952c8b6daecd36b378e2d01be22c
04397fe94ad65289884b9862b6a0c722ececaadf
780427f0e113b4c77dfff4d258c05a902cdb0eb9
5584880e44e49c587059801faa2a9f7d22619c48
47433b8c9d7480a3eebd99df38e857ce85a37cee

David

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References:
- [Xen-devel] Wall-Clock-Time-Jump after migration [xen-4.1]
  - From: Philipp Hahn

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