Today as i tried to re-activate my kvm/libvirt/virt-manager-setup after a few months of inactivity i remarked that something was wrong. First and foremost that virt-manager wasn't able to display my locally installed vms. After further investigation i found this in various logfiles: cannot open /sys/devices/system/cpu/cpu1/online: No such file or directory Some internet research revealed that CONFIG_HOTPLUG_CPU=y needs to be enabled in kernel if one needs the above file. After i've enabled this additional setting, recompiled and installed the new kernel and rebooted the machine i was able to work with kvm,libvirt and virt-manager as expected again. I think the ebuild should check if the above mentioned option is set in the kernel-configuration and abort the installation if it's not. Reproducible: Always Steps to Reproduce: 1. set CONFIG_HOTPLUG_CPU=n 2. recompile and install new kernel 3. reboot 4. /etc/init.d/libvirtd start Actual Results: got the error message mentioned in the Description above and was thus unable to work with my vms Expected Results: As installation was successfully i expected things to "just work" but instead i encountered the error message mentioned in the description.
Can you confirm this with newer versions? It shouldn't be fatal any longer.
I just checked this again and at least with app-emulation/libvirt-0.8.7 the issue seems to be gone...
