Re: [KVM PATCH v9 2/2] KVM: add iosignalfd support

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On Tue, Jul 07, 2009 at 03:56:09PM +0300, Avi Kivity wrote:
> On 07/07/2009 03:48 PM, Michael S. Tsirkin wrote:
>>>>> +
>>>>> +		__kvm_io_bus_unregister_dev(bus,&p->dev);
>>>>> +		iosignalfd_release(p);
>>>>>
>>>>>          
>>>> a single deassign removed multiple irqfds? Looks ugly.
>>>>
>>>>        
>>> Avi requested this general concept.
>>>      
>>
>> Really? Avi, could you explain? I would think each
>> assign needs to be matched with 1 deassign. No?
>>    
>
> Doesn't it follow naturally?

Yes.

> How can a single deassign remove multiple  
> fds (unless all were registered with exactly the same arguments)?
> Maybe we should instead detect that the duplicate iosignaldfds are  
> registered.
>
> Note that we do need to allow the same fd to be multiple times, but not  
> with exactly the same address/match etc.

-- 
MST
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