I assume the flag referred to is /proc/sys/xen/independent_wallclock which appears in both xen0 and xenU and is set to "0" in both.

Howard Lowndes wrote:


Matthew Palmer wrote:
On Fri, May 26, 2006 at 01:19:39PM +1000, Howard Lowndes wrote:
I should point out, though I don't see it as relevant, that this is a Xen guest server and one of the reference clocks is the Xen host but the other is independent.

It's 100% relevant.  By default, the domU kernel clocks are locked to
the dom0 clock, and you can't change it in the domU. There is a proc flag
in /proc in (I think) the dom0 which makes them independent, but I can't
remember what it is (although I have a note of it here somewhere).

In which case they should all be showing the same offset, I would have thought, but they don't, and the offsets are not remaining consistent either, steadily varying over time.

It's now lodged at Bugzilla: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=193213


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