Comment 24 for bug 146924

Euh, i just might have found the something interesting..
This morning, i wanted to check my mails ( which run in a domU ). I noticed i couldn't get to it, "Unable to connect", as usual.. But i had cacti open, which could read snmp from the server just fine.
I logged in through SSH, and noticed that the date was set to "Fri Dec 22 22:49:54 CET 2226", and not going forward anymore. The clock had stopped.

In the meantime, /var/log/messages was spewing messages like this:

[134918.952935] clocksource/0: Time went backwards: delta=-6917269600674797899 shadow=134918109266738 offset=843667158
[134923.954592] printk: 1157408 messages suppressed.
[134923.954606] clocksource/0: Time went backwards: delta=-6917269595673126078 shadow=134923109294656 offset=845310074
[134928.952308] printk: 1154382 messages suppressed.
[134928.952323] clocksource/0: Time went backwards: delta=-6917269590675409336 shadow=134928109321066 offset=842999953

I decided to change something to see if it works, so i did:
cat /sys/devices/system/clocksource/clocksource0/current_clocksource, which showed "xen" as usual.
I then did
echo "jiffies" > /sys/devices/system/clocksource/clocksource0/current_clocksource, which instantly made my clock run again, and stalled programs revived. I saw my webmail ( which was still hanging all the time ) spring to life, along with my previously entered reboot command..

Does this narrow down the search to the solution?

Kind regards,

Bart