I have two KVM servers where I'm doing GPU passthrough to a VM. Both are
running linux 4.6.4.
We're using an NVIDIA GPU which means I have to hide KVM (kvm=off, or
).
As a result, current_clocksource is tsc. ntpd shows a drift of ~0.
So in seems that the tsc values the VM is getting are
On 10/06/2016 08:55 PM, Ben Hutchings wrote:
Presumably you consider the behaviour on 4.6/4.7 to be undesirable.
From what I can see, the host side may attempt to keep the pvclock
synchronised with its real time but it is not recommended for guests to
rely on this.
It looked like an
Control: tag -1 moreinfo
On Mon, 2016-10-03 at 04:33 -0400, Gedalya wrote:
> Package: src:linux
> Version: 4.7.5-1
> Severity: normal
>
> Dear Maintainer,
>
> When booting the host with linux 3.16, it looks like kvm-clock
> provides guests with time as adjusted by ntpd.
[...]
> When booting
Package: src:linux
Version: 4.7.5-1
Severity: normal
Dear Maintainer,
When booting the host with linux 3.16, it looks like kvm-clock provides guests
with time as adjusted by ntpd.
This looks like this (note the 'frequency' variable [0]):
host :
# ntpq -crv
associd=0 status=0415 leap_none,
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