Re: kvm-45 problems

Avi Kivity
2007-10-09T09:57:38Z

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Farkas Levente wrote:
> Avi Kivity wrote:
>
>> Farkas Levente wrote:
>>
>>> Avi Kivity wrote:
>>>
>>>
>>>> Zhao, Yunfeng wrote:
>>>>
>>>>
>>>>> We run some booting multiple guest tests in our nightly testing.
>>>>> Like booting two UP windows guests, booting one UP linux guest and one UP windows guest, and booting 4 UP linux guests.
>>>>> The first two cases have no problem in our testing.
>>>>> And booting 4 UP linux guests may crash host, but this problem doesn't happen very time. If the problem didn't happen, linux guest can be log in without any problem.
>>>>>
>>>>> For smp guest, we meet a problem that booting linux guest with 4 vcpus causes soft lock error on host. Once this error happened, qemu process also could not be killed.
>>>>>
>>>>> Our linux guests are using 2.6.9, 2.6.16, and 2.6.23 kernels.
>>>>>
>>>>>
>>>>>
>>>>>
>>>> This may be due to NMIs or MCEs. Is it possible your machine is
>>>> receiving them?
>>>>
>>>>
>>> what does it mean?
>>>
>>>
>> Non-maskable interrupts and machine check exceptions.
>>
>
> is it something which i can trigger (as as user of kvm)?
>
>

It's something that happens as part of the ordinary workload of the
machine. I suspect that kvm doesn't handle it correctly.

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