Re: [REGRESSION?] -no-kvm-irqchip broken with kvm.git

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

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Avi Kivity wrote:
> Jan Kiszka wrote:
>> Jan Kiszka wrote:
>>  
>>> Hi,
>>>
>>> I'm currently facing problems to get kvm working with -no-kvm-irqchip.
>>> It used to be fine up to kvm-71, but with latest git my Linux guest
>>> stalls during early boot:
>>>
>>> [   22.631200] Freeing unused kernel memory: 324k freed
>>> [   22.857098] SCSI subsystem initialized
>>> [   22.892601] scsi0 : ata_piix
>>> [   22.903604] scsi1 : ata_piix
>>> [   22.904473] ata1: PATA max MWDMA2 cmd 0x00000000000101f0 ctl
>>> 0x00000000000103f6 bmdma 0x000000000001c000 irq 14
>>> [   22.917692] ata2: PATA max MWDMA2 cmd 0x0000000000010170 ctl
>>> 0x0000000000010376 bmdma 0x000000000001c008 irq 15
>>>
>>> This seems to be a kernel-side issue, replacing the module set with the
>>> one that came with -71 fixes the issue. Maybe due to
>>> vmx_complete_interrupts refactoring?
>>>     
>>
>> Looks like my suspect was right: Kicking vmx_complete_interrupts out of
>> vmx_vcpu_run makes -no-kvm-irqchip work again.
>>
>> Avi, could it be that 1c0f4f5011829dac96347b5f84ba37c2252e1e08 left
>> do_interrupt_requests outdated behind? Or is vmx_complete_interrupts
>> incorrectly queuing interrupts in the -no-kvm-irqchip case?
>>
>>   
> 
> I thought I tested out -no-kvm-irqchip, but apprently not well enough. 
> I'll try to see what went wrong.

Should this issue have been fixed meanwhile? I just gave latest git a
try and - as far as I recall my tests before holiday correctly - things
look the same. At least some Linux 2.6.23 kernel still hangs here during
early boot with -no-kvm-irqchip.

Jan


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