Re: kvm-78 - kernel panic after using system_reset except when using -no-kvm-irqchip

[Jan Kiszka <jan.kiszka@web.de>]

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Charles Duffy wrote:
> Jan Kiszka wrote:
>> Charles Duffy wrote:
>>> irq 25, desc: ffffffff803afc80, depth: 1, count: 0, unhandled: 0
>>> ->handle_irq():  ffffffff800b54e3, handle_bad_irq+0x0/0x1f6
>>> ->chip(): ffffffff802ea700, 0xffffffff802ea700
>>> ->action(): 0000000000000000
>>>   IRQ_DISABLED set
>>> unexpected IRQ trap at vector 19
>>> ..MP-BIOS bug: 8254 timer not connected to IO-APIC
>>> timer doesn't work through the IO-APIC - disabling NMI Watchdog!
>>> Kernel panic - not syncing: IO-APIC + timer doesn't work! Try using the
>>> 'noapic' kernel parameter
>>
>> Still too early for me, so I didn't get yet if you can trigger this
>> guest panic reliably or only sporadically (like I can). In the former
>> case I would be very interested in the how!
> 
> Reproduced 100% of the time when using system_reset at the qemu monitor
> console coming from a non-panic'd state. (Thus, it happens only every
> other time doing a series of boots and system_reset monitor commands).

Mmmh, /that/ sounds like some (re-)initialization issue of the
virtualized hardware. OK, once that kernel boots again on latest kvm.git
(currently broken due to a different issue), I will try to reproduce it.

Thanks,
Jan

PS: Please keep CCs.


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