Re: -smp >=2 + -no-kvm-irqchip broken

[Jan Kiszka <jan.kiszka@siemens.com>]

Jan Kiszka wrote:
> Gleb Natapov wrote:
>> On Tue, Feb 02, 2010 at 05:41:03PM +0100, Jan Kiszka wrote:
>>> Gleb Natapov wrote:
>>>> On Tue, Feb 02, 2010 at 05:29:53PM +0100, Jan Kiszka wrote:
>>>>> Hi,
>>>>>
>>>>> notice while testing v2 of my vcpu state series: Starting SMP guests
>>>>> like Linux or Vista without in-kernel irqchip and with more than one CPU
>>>>> make them lock up during boot (Vista) or spit out messages like
>>>>>
>>>>> udevd[112] trap invalid opcode ip:7fc434630950 sp:7fff3cd3fcb8 error:0
>>>>> in libc-2.9.so[7fc4345b2000+14f000]
>>>>>
>>>> Looks like interrupt is injected as exception. Can you try to bisect?
>>> Already started (as low prio background task), first looking for a good
>>> version. If you know a recent one, I'm a taker.
>>>
>> Nope, didn't try no kernel irqchip for a long time.
> 
> Kernel plays the key role here, either kvm-kmod or actually the kvm
> module: kvm-kmod-2.6.31.6 works, the 2.6.32 series and later do not.
> Digging deeper...

I take this back: It works for Linux guests, but Vista crashes also with
old kvm-kmod. So there is no way around real debugging.

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux