I'm sending a first draft of my proposed cpu hotplug driver for kvm/virtio The first patch is the kernel module, while the second, the userspace pci device.
The host boots with the maximum cpus it should ever use, through the -smp parameter. Due to real machine constraints (which qemu copies), i386 does not allow for any addition of cpus after boot, so this is the most general way. I do however, include an "attempt_buffer" in the userspace part. It's purpose is to allow tools like virt-manager to set a max_cpus (-smp), and a desired number of cpus in their configuration files. (and AFAICT, there's is no easy way for them to tell when the backend driver is up and running) Other than that, it should be pretty much straightforward. Looking forward for your comments _______________________________________________ Virtualization mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/virtualization
