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Re: [Xen-devel] Time Change Issue Xen 4.1

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] Time Change Issue Xen 4.1
From: Laszlo Ersek <lersek@xxxxxxxxxx>
Date: Mon, 14 Nov 2011 11:15:27 +0100
Cc: pbonzini@xxxxxxxxxx, keir.xen@xxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, JBeulich@xxxxxxxx, Niall Fleming <niall.fleming@xxxxxxxxxxxxxxxxx>
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On 11/11/11 19:39, Konrad Rzeszutek Wilk wrote:
On Fri, Nov 11, 2011 at 05:25:52PM +0000, Niall Fleming wrote:

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!

I shut the VM down (2.6.32-131.0.15.el6) before the systime/hwclock change in dom0 (2.6.18-286.el5xen), and restarted it afterwards. The guest entered an infinite loop during this boot :(

Thanks
Laszlo

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