I'm seeing this both on dom0 and domU with ...-19.34.
As far as I can tell, there's no relation between seeing this on dom0 and domU.
However, there seem to be no side-effects.
(this is an amd64 install on both dom0 and domU and xen 3.2.1 from debian)
dom0:
Jun 26 14:02:06 quark kernel: [187781.880995] clocksource/0: Time went backwards: ret=ac186aa11cf0 delta=-36099370 shadow=ac183af22f78 offset=31d8212e
domu:
Jun 25 17:02:03 suzy2 kernel: [111734.752716] clocksource/0: Time went backwards: ret=6754298ec3ef delta=-64141945 shadow=675421edd381 offset=b7493a5
I'm seeing this both on dom0 and domU with ...-19.34.
As far as I can tell, there's no relation between seeing this on dom0 and domU.
However, there seem to be no side-effects.
(this is an amd64 install on both dom0 and domU and xen 3.2.1 from debian)
dom0:
Jun 26 14:02:06 quark kernel: [187781.880995] clocksource/0: Time went backwards: ret=ac186aa11cf0 delta=-36099370 shadow=ac183af22f78 offset=31d8212e
domu:
Jun 25 17:02:03 suzy2 kernel: [111734.752716] clocksource/0: Time went backwards: ret=6754298ec3ef delta=-64141945 shadow=675421edd381 offset=b7493a5