Re: phenom, amd780g, tsc, hpet, kvm, kernel -- who's at fault?

Ingo Molnar
2009-03-23T15:42:22Z

> Now, after quite some googling around, I tried to disable hpet,
> booting with hpet=disable parameter. And that one fixed all the
> problems at once. 7 days uptime, I stress-tested it several times,
> it works with TSC as timesource (still a problem within guests as
> those shows unstable TSC anyway) since boot, no issues logged.
> Even cpufreq works as expected...
>
> Note that i tried to disable hpet as clocksource several times but
> without any noticeable effect - kernel still used hpet and hpet2
> for something, and printed that scary "increasing min_delay"
> message on a semi-regular basis usually after the next 'stuck'
> state....

It could again go bad like it did before - those messages are signs
of HPET weirdnesses.

Probably your box's hpet needs to be blacklisted, so that it gets
disabled automatically on bootup.

Ingo