[..] > Lets establish some terminology to understand each other better: > Lets use CPU inserted/ejected to refer to cpu being available/not > available to a guest. > Lest use CPU online/offline to refer to cpu been used by a guest OS. > > CPU hot-plug works like this: > cpu is inserted (plugged into cpu socket on MB) > guest OS is notifies through ACPI > guest OS starts to use newly added CPU (makes it online) > > CPU hot-unplug works like this: > guest OS is notifies through ACPI that cpu is going to be removed > guest OS stops to use cpu (makes it offline) > cpu is ejected (removed from a socket on MB) (kvm never does that part) > > So which part do you want to know about from a host? > > You can't really know from a host if cpu is used by guest OS (if it is > online/offline in s guest in our terminology) > > inserted/ejected is management action (it can't be initiated by a > guest), so you can keep track of it by yourself. KVM doesn't do it > for you right now. More precisely it does, but doesn't have a way to > quire it. I need to know if a cpu is currently inserted or ejected. I gather a cpu which is currently "inserted", may potentially be used by a guest os. (Wether he actually uses a cpu, puts it online or offline, isn't my concern). The amount of time and number of cpus available to a guest is what I like to keep track of. Conrad -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
