Re: [Xen-devel] Failure to boot, Debian squeeze with 4.0.1 hypervisor, timer problems?

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 27.07.12 at 18:15, Andy Smith <andy@xxxxxxxxxxxxxx> wrote:
> I upgraded it to Debian squeeze, with xen-hypervisor-4.0-amd64
> (4.0.1-4) / linux-image-2.6.32-5-xen-amd64 (2.6.32-45) and now it
> does not complete a boot of the dom0 kernel.

The minimum would be to check against 4.0.3 (ideally tip of
4.0-testing), to exclude a problem already fixed even on that
branch.

Next would be to try with -unstable.

Other options to try would be
- dropping "dom0_mem="
- trying "clocksource=acpi"
- trying "clocksource=pit"

Jan

> I can boot it into a vanilla kernel directly on bare metal and it
> seems okay with that.
> 
> Reproduced below is full serial console output of boot of hypervisor
> and dom0 kernel. I've indicated the points where progress seems to
> halt or be abnormally slow. The boot ends with a repeated message
> of:
> 
> [10065189777.645584] CE: xen increasing min_delta_ns to 7197131137619773666 
> nsec
> [10065189777.645584] CE: xen increasing min_delta_ns to 1572324669574884690 
> nsec
> etc.
> 
> Between this and some other messages about timers earlier on I
> gather there are timer problems here at the very least.
> 
> If anyone has any suggestions for boot parameters that may allow
> further diagnosis or workarounds I would be extremely grateful.
> Otherwise I guess I replace the motherboard with a different one and
> hope it works.



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