[Xen-devel] Time Change Issue Xen 4.1

[Niall Fleming <niall.fleming@xxxxxxxxxxxxxxxxx>]

Hi all,

Already posted this over in xen-users and Konrad confirms it as a bug and suggested to repost
it over here!

Issue is that changing the time in dom0 doesn't take effect on the VMs until a reboot of dom0.
The testing example below illustrates what I mean....

Synopsis of testing:

Booted the physical machine, date tells me it's 17:15:45. Hwclock agrees.
Booted a VM (using xl as xm seems to be labouring under the impression that blockdev is missing - it isn't)
The login prompt displays the time as 17:17, which is the expected behaviour.
Changed the time in dom0 - (date +%T -s 12:00:00), synced to hwclock.
Check that date and hwclock match - they do.
Destroy the VM and recreate.
The login prompt displays the time as 17:22. Unexpected!


Kernel: I git cloned tag v3.1 from the kernel.org linux.git, and applied xen-settime patches
Also tested with jeremy-git-xen-next-2.6.32 (.41/.46) without patch, they wouldn't apply.
Xen: 4.1.1/4.1.2
Distribution: Gentoo

It still doesn't work.

I've tested that the issue also exists in Debian Squeeze (with linux-image-3.0.0 from testing as 2.6.32-5 is broken
on my hardware).

--

Niall Fleming BSc. (Hons)
Systems Administrator
Webanywhere Limited

Phone: 0800 862 0131 Ext: 203
Web: http://www.webanywhere.co.uk

Aire Valley Business Centre, Lawkholme Lane, Keighley, BD21 3BB
Registered in England with company number 4881346

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