Re: when to use virtio (was Re: [PATCH v4 0/8] Introduce the microvm machine type)

[Paolo Bonzini]

On 25/09/19 12:50, David Hildenbrand wrote:
> Can't tell if there might be extensions (if virtio-mem ever comes to
> life ;) ) that might make use of asynchronous communication. Especially,
> there might be asynchronous/multiple guest->host requests at some point
> (e.g., "I'm nearly out of memory, please send help").

Okay, this makes sense.  I'm almost sold on it. :)

Config space also makes sense, though what you really need is the config
space interrupt, rather than config space per se.

Paolo

> So yes, currently we could live without the ring buffer. But the config
> space and the virtqueue are real life-savers for me right now :)