Paolo Bonzini <pbonzini@xxxxxxxxxx> 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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