Comment 55 for bug 190414

Revision history for this message
Félim Whiteley (felimwhiteley) wrote :

Hi There,

I'm having this exact problem on Hardy Server, but this is fairly critical for me. The same error is logged:

Sep 20 10:22:25 host-01 kernel: [51281.289424] Clocksource tsc unstable (delta = 3323063740502 ns)
Sep 20 10:22:25 host-01 kernel: [51281.299403] Time: acpi_pm clocksource has been installed.
Sep 20 10:22:26 host-01 kernel: [51282.778316] NET: Registered protocol family 17

The problem here is once acpi_pm is installed the clock stays at that time as ntp seems to either be unable to update time or it constanly loses time and ntp manages to "hold" the time at the current time (Sep 20 10:22:26 in this case). This is a real showstopper as this causes all sorts of problems, Cacti graphs stop logging as it effectivly freezes in time as far as cacti is concerned and nagios/cron have problem scheduling things. The server (I've two that do this) both running 2.6.24-19-server become highly unstable, ssh logins fail, the system becomes highly unresponsive. I haven't pinned down when exactly this occured but it's basically rendered Hardy Server useless. It seems to have happened int he last couple of weeks but I'll be digging through the old logs to see... the problem being the logs are pretty useless with the time being completely off !

As regards changing clocksource the ones available are:
sudo cat /sys/devices/system/clocksource/clocksource0/available_clocksource
acpi_pm jiffies tsc

I'm trying jiffies as acpi_pm and tsc appear useless. The processor is a Intel(R) Xeon(TM) CPU 2.40GHz and it's Dell server, I'm afraid I'll have to update later on model numbers (it's a remote system) in case this is something hardware specific as I know both are the same, in fact so far a 3rd Server which is a HP proliant hasn't show same error.

I'd have to say I can't really wait for Ibex on this as the whole point of LTS Server is so it can sit there for 2 years or so till the next LTS. If you need and more info or want me to test anything then no problem.

- Félim