http://bugzilla.novell.com/show_bug.cgi?id=545191
User pgnet.dev@gmail.com added comment
http://bugzilla.novell.com/show_bug.cgi?id=545191#c4
--- Comment #4 from account disabled
I have to admit that I have no clue what to do with this: I know very little about NTP, but I do know that others are using NTP on Xen without issues.
i'm not at all convinced that it's a problem with ntp, but suspect, instead, kernel clocksource ... in no particular order, here area number of references that -- at best -- demonstrate confusion in abundance, http://lists.xensource.com/archives/html/xen-devel/2009-05/msg01201.html http://www.linux-archive.org/debian-kernel/326055-bug-534978-clock-drift-xen... http://www.novell.com/communities/node/8629/time-synchronization-xen-setup http://www.linux.org.za/Lists-Archives/glug-tech-0905/msg00271.html http://www.gossamer-threads.com/lists/linux/kernel/1039416 http://lists.ntp.isc.org/pipermail/questions/2009-August/024110.html https://bugs.launchpad.net/xen/+bug/146924 http://lists.ntp.isc.org/pipermail/questions/2006-June/010460.html a common issue, questioned but not resolved, seems to be the type of clocksource. apparently (?), different OS's kernel-xen have different available/default clocksources ... which exhibit different behaviors. i'm still reading up ... so, yes, "others" get it to work. but under what reproducible conditions? hardly well documented, afaict ... i've now been able to reproduce the problem i've reported here on multiple motherboards from multiple vendors -- removing, in effect, the "it's your rtc that's dead" argument. the systems demonstrating this issue are all opensuse 11.1 with release- &/or SL111- version kernels. *solaris systems are having no such problems -- but, of course, that's apples and oranges. i've not yet done these tests on other Linux setups. note, also, that the situation of how time's kept is (?) changing as kernels evolve towards pv-ops, away from 'xenified'. J Fitzhardinge (he's @suse, no?) is involved in those discussions (e.g., http://lists.xensource.com/archives/html/xen-devel/2009-05/msg01201.html).
attaching kernel and hypervisor messages
in the Dom0 case, i suspect? captured via serial port? or are dmesg & xm dmesg output sufficient? -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.