On Sun, Sep 19, 2010 at 05:37:18PM +0200, Conrad Wood wrote: > > > > I need to know if a cpu is currently inserted or ejected. > > > > > The only way to do that currently is to track it in your management app. > > The Management App does know which one should be inserted or ejected. > I see now way of enforcing it though. > > This is what I had in mind: (simplified) > > 1. Management App increase cpus > 2. kvm (as instructed by app): insert cpu x > 3. guest os: online cpu x > 4. do some stuff in the guest... > 5. guest os: offline cpu x > 6. Management App decrease cpus > 7. kvm (as instructed by app): eject cpu x > > However after step 7 the guest can turn the cpu online again by issuing > echo 1 >/sys/devices/.../cpuX/online There will be no /sys/devices/.../cpuX/online in guest after step 7. > If the guest does so, the Management App has no way of knowing and thus > cannot provide accurate logs - that is why it is so important. > > Conrad > > -- Gleb. -- 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
