On Wed, Jan 16, 2019 at 09:42:21AM +0100, Christophe Dumont wrote: > Hello, > > Do you know what this means : > > kvm: 2918: cpu0 unhandled rdmsr: 0x345 > kvm: 2918: cpu0 unhandled rdmsr: 0x1c9 > kvm: 2918: cpu0 unhandled rdmsr: 0x1a6 > kvm: 2918: cpu0 unhandled rdmsr: 0x1a7 > kvm: 2918: cpu0 unhandled rdmsr: 0x3f6 > tap110i0: no IPv6 routers present > kvm: 2952: cpu0 unhandled rdmsr: 0x345 > kvm: 2952: cpu0 unhandled rdmsr: 0x1c9 > kvm: 2952: cpu0 unhandled rdmsr: 0x1a6 > kvm: 2952: cpu0 unhandled rdmsr: 0x1a7 > kvm: 2952: cpu0 unhandled rdmsr: 0x3f6 > > I think it causes instability, we had to reboot the server twice and a > backup script still fails. KVM has a whitelist of MSRs that it handles. These messages show that the guest has been doing reads on various MSRs that KVM does not support. These can sometimes be the the cause of bugs, but others may be harmless. Best to report these to the KVM community, with details about your host hardware CPU models, and what guest OS you are running Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|