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xen-users
RE: [Xen-users] Desynchronize clock
Petersson, Mats wrote:
>> -----Original Message-----
>> I don't want my dom0 to update the clock in my HVM domU. I've
>> already disabled network-based time synchronization inside the HVM.
>> I've tried
>> setting /proc/sys/xen/independent_wallclock=1 and then restarting
>> xend, but the guest still gets the correct time.
>
> Did you set independent wallclock in the guest or on Dom0? You should
> set it on guest, as that's "who" should have a different clock to
> Dom0, right? It's a per-domain settings, so individual domains are
> allowed to be either independent or "same".
>
Ah, good point. Unfortunately, the guest is Windows, so there is no
/proc/sys/xen/independent_wallclock setting inside the HVM. What I
need is a way to tell domU which domains should be given access to the
system or hardware clocks.
In a recent, related post, someone said that for HVMs, "Dom0 time has
no bearing to the guest's time." However, every time I reboot the
Windows HVM it has the correct time. Since I've disabled network-based
time synch inside the Windows HVM, I have to assume it's getting the
time from either dom0's system clock or from the hardware clock on the
motherboard, no?
Steve Brueckner, ATC-NY
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