Marcelo Tosatti wrote:
>> How to proceed now? Do we want to efficiently support ballooning without
>> mmu notifiers? If so, an ioctl to zap the mmu is necessary as discussed
>> before.
>>     
>
> Err, actually zapping the mmu is necessary to guarantee guest will not
> use stale shadow entries vs entries pointing to old unreacheable pages.
>   

I'm happy to just not madvise() with older host userspaces.  Doing an 
ioctl and pausing all the VCPUs is pretty ugly.

Regards,

Anthony Liguori

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