* [Qemu-devel] Clock skew after pausing guests
@ 2011-03-17 14:24 Virtbie
2011-03-17 14:34 ` [Qemu-devel] " Timur Safin
0 siblings, 1 reply; 2+ messages in thread
From: Virtbie @ 2011-03-17 14:24 UTC (permalink / raw)
To: qemu-devel, 'KVM-ML (kvm@vger.kernel.org)'
Hello all
I am seeing, perhaps unsurprisingly, a skewed system clock after pausing
and then resuming a qemu-kvm guest. The guest continues with its earlier
time.
Since I'd like to use the pause technique for backups, which can take 1
hour, this is significant.
This is with windows guests, and it doesn't seem to recover by itself
just by waiting.
Linux guests instead seem to adjust their clock correctly after the resume.
Is there any way to tell the windows guests to resynchronize its clock
with the host?
I am using virsh / libvirt.
Thank you
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Qemu-devel] Re: Clock skew after pausing guests
2011-03-17 14:24 [Qemu-devel] Clock skew after pausing guests Virtbie
@ 2011-03-17 14:34 ` Timur Safin
0 siblings, 0 replies; 2+ messages in thread
From: Timur Safin @ 2011-03-17 14:34 UTC (permalink / raw)
To: Virtbie; +Cc: qemu-devel, KVM-ML (kvm@vger.kernel.org)
Have you checked with Windows Time service enabled in the guest?
net start w32time
Best Regards,
Timur
2011/3/17 Virtbie <virtbie@shiftmail.org>:
> Hello all
> I am seeing, perhaps unsurprisingly, a skewed system clock after pausing
> and then resuming a qemu-kvm guest. The guest continues with its earlier
> time.
> Since I'd like to use the pause technique for backups, which can take 1
> hour, this is significant.
>
> This is with windows guests, and it doesn't seem to recover by itself
> just by waiting.
>
> Linux guests instead seem to adjust their clock correctly after the resume.
>
> Is there any way to tell the windows guests to resynchronize its clock
> with the host?
> I am using virsh / libvirt.
>
> Thank you
>
> --
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>
^ permalink raw reply [flat|nested] 2+ messages in thread
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