Re: [PATCH 5/9] kvm-x86: Enable NMI Watchdog via in-kernel PIT source

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

Yang, Sheng wrote:
> On Friday 19 September 2008 20:03:02 Jan Kiszka wrote:
>> LINT0 of the LAPIC can be used to route PIT events as NMI watchdog
>> ticks into the guest. This patch aligns the in-kernel irqchip emulation
>> with the user space irqchip with already supports this feature. The
>> trick is to route PIT interrupts to all LAPIC's LVT0 lines.
>>
>> Rebased patch and slightly polished patch originally posted by Sheng
>> Yang.
> 
> Signed-off-by: Sheng Yang <sheng.yang@intel.com>
> 
> Thanks for pick up this patch again! 
> 
> Have you test some Windows guest with this watchdog? Last time I dropped it 
> because it cause BSOD on some version of Windows(IRQ_NOT_EQUAL_OR_LESS). I 
> don't remember the exactly situation there, but you may have a try. 

Not yet. I always tell my colleagues that I don't need Windows on my
desktop, I just need a few VM images - for testing... :)

I will try to dig out / generate some image and reproduce the issue you
and Gleb see. Hope it will trigger here as well. Anything special
required to make Windows use the NMI as watchdog?

Jan

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