Re: [Xen-devel] repeatable time jump

[Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>]

> 
> " None of this makes much sense. It's certainly worth instrumenting
> " SETTIME.
> 
> I added a printk in do_dom0ops.   I saw the same 70 minute jump ahead in
> the system clock in domain 0 when I shutdown domain 1.   I did not get any
> new SETTIME printk from xm dmesg.  The only settime calls occured when
> dom0 booted and ntp started.  

That's what I'd expect.
> 
> " No -- SETTIME effectively sets the dom0 system time, that Xen
> " also exports to other domains.
> 
> So does that mean from the dom0 perspective that system time and hwclock
> time should always be identical?

Close, but not identical. The hwclock time will be written back
periodically.

> What hwclock says on dom0 did not change. Just what date says changed.

Bizarre. Anything unusual about this machine compared to the
others that are OK? 

Ian


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