Re: [PATCH 0/2] kvm: fix spurious interrupt with irqfd

[Michael S. Tsirkin]

On Wed, Jan 20, 2010 at 05:09:32PM +0200, Avi Kivity wrote:
> On 01/20/2010 04:58 PM, Michael S. Tsirkin wrote:
>>
>>> I'm uncomfortable with pushing Davide's patch into stable and possibly
>>> causing regressions with unrelated applications.  Can't a guest live
>>> with a spurious interrupt?
>>>      
>> Well guests mask/unmask vector on each interrupt, so this will trigger
>> an irq storm I think.
>>
>>    
>>>   It's not like they're unknown.
>>>      
>> Depends on the device really.
>> In theory, if they trigger at an unfortunate time this could cause
>> crashes.
>>
>>    
>
> I'd like confirmation on both of these before I push things to stable.

I have observed the interrupt storm. We end up with interrupt being
disabled. Crash is a theoretical issue.

-- 
MST
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/