Re: [Xen-users] Time change conundrum

[Miles Fidelman <mfidelman@xxxxxxxxxxxxxxxx>]

First off... take a look at http://wiki.debian.org/Xen, look for the 
section on 'clocksource/0: Time went backwards'
Niall Fleming wrote:
> Here's a confusing issue for you, I have a bunch of machines running 
> Xen 4.1.
> The time in the BIOS was wrong at machine power on, so logically, I 
> set the time in
> Dom0 with NTP and synced it back to the hardware clock (just in case). 
> I restart the
> VMs which came up before the time changed, so that they would get the 
> correct time
> on startup (as has always worked in the past with Xen 3.x).
>
> The VMs do *not* come up with the initial clock set by the system 
> clock in Dom0, they
> persist in using the time before it was set on the host system (plus 
> however many
> seconds/minutes etc.) have passed, so the original clock time on Dom0 
> is ticking along
> somewhere even though every utility in the system seems to report the 
> 'correct' time
> as I have set by NTP.
>
> Any ideas? I'm at my wit's end with it, I've tried different kernels 
> (albeit with [almost] the same
> config), both jeremy-git-xen-next-2.6.32 and linux 3.1.0+ (latest from 
> git). I've tried with different
> Xen version 4.1.0/4.1.1/4.1.2 and the problem exists in each of them.
>
> I know that I can run NTP in each VM, but I'd like the system time to 
> be correct at boot up as it
> will make the timestamps in the logs very confusing when it jumps back 
> an hour.
> --
>
> *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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--
In theory, there is no difference between theory and practice.
In<fnord>  practice, there is.   .... Yogi Berra



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