Chris Wright wrote:
> * Avi Kivity (avi@redhat.com) wrote:
>   
>> Gregory Haskins wrote:
>>     
>>> Cool,  I will code this up and submit it.  While Im at it, Ill run it
>>> through the "nullio" ringer, too. ;)  It would be cool to see the
>>> pv-mmio hit that 2.07us number.  I can't think of any reason why this
>>> will not be the case.
>>>       
>> Don't - it's broken.  It will also catch device assignment mmio and  
>> hypercall them.
>>     
>
> Not necessarily.  It just needs to be creative w/ IO_COND
>   

Hi Chris,
   Could you elaborate?  How would you know which pages to hypercall and
which to let PF?

-Greg