Re: [Qemu-devel] Re: [PATCHv2 2/2] tap: mark fd handler as device

[Anthony Liguori]

On 11/15/2010 02:53 PM, Stefan Hajnoczi wrote:
> vhost has a solution for this: register a VMChangeStateHandler
> function that stops ioeventfd while vm_stop(0) is in effect.  Then
> poll to see if there is work pending.
>
> I will add equivalent functionality to virtio-ioeventfd.
>    

I still think that stopping this at the net/block layer is going to be a 
lot more robust in the long term.  All net/block traffic flows through a 
single set of interfaces whereas getting the devices to completely stop 
themselves requires touching every device and making sure that noone 
adds back vmstop-unfriendly behavior down the road.

Regards,

Anthony Liguori

> Stefan
>