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. Paolo
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