Re: [PATCH v4 0/8] Introduce the microvm machine type

[Sergio Lopez]

Paolo Bonzini <address@hidden> writes:

> On 25/09/19 10:10, Sergio Lopez wrote:
>> That would be great. I'm also looking forward for virtio-mem (and an
>> hypothetical virtio-cpu) to eventually gain hotplug capabilities in
>> microvm.
>
> I disagree with this.  virtio is not a silver bullet (and in fact
> perhaps it's just me but I've never understood the advantages of
> virtio-mem over anything else).
>
> If you want to add hotplug to microvm, you can reuse the existing code
> for CPU and memory hotplug controllers, and write drivers for them in
> Linux's drivers/platform.  The drivers would basically do what the ACPI
> AML tells the interpreter to do.
>
> There is no reason to add the complexity of virtio to something as
> low-level and deadlock-prone as CPU hotplug.

TBH, I haven't put much thought into this yet. I'll keep this in mind
for the future.

Thanks,
Sergio.

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