I have a server that hosts about 20 KVM guest machines. It's syslog is, at times, flooded with messages like these:
00:17:36 vhost-server kernel: [ 157.835078] kvm: 3138: cpu0 unhandled rdmsr: 0xc0010112 Mar 28 00:17:36 vhost-server kernel: [ 157.835108] kvm: 3138: cpu0 unhandled rdmsr: 0xc0010048 Mar 28 00:17:36 vhost-server kernel: [ 157.999164] kvm: 3138: cpu0 unhandled rdmsr: 0xc0010001 Mar 28 00:17:37 vhost-server kernel: [ 158.378247] kvm: 3179: cpu0 unhandled rdmsr: 0xc0010112 Mar 28 00:17:37 vhost-server kernel: [ 158.378277] kvm: 3179: cpu0 unhandled rdmsr: 0xc0010048 Mar 28 00:17:37 vhost-server kernel: [ 158.551881] kvm: 3179: cpu0 unhandled rdmsr: 0xc0010001 Mar 28 00:17:39 vhost-server kernel: [ 160.474937] kvm: 3508: cpu0 unhandled rdmsr: 0xc0010112 Mar 28 00:17:43 vhost-server kernel: [ 164.335746] kvm: 3342: cpu0 unhandled rdmsr: 0xc0010112 Mar 28 00:17:43 vhost-server kernel: [ 164.335752] kvm: 3342: cpu0 unhandled rdmsr: 0xc0010048 Mar 28 00:17:43 vhost-server kernel: [ 164.502836] kvm: 3342: cpu0 unhandled rdmsr: 0xc0010001 Mar 28 00:17:44 vhost-server kernel: [ 165.198538] kvm: 3392: cpu0 unhandled rdmsr: 0xc0010112 Mar 28 00:17:44 vhost-server kernel: [ 165.198545] kvm: 3392: cpu0 unhandled rdmsr: 0xc0010048 Mar 28 00:17:44 vhost-server kernel: [ 165.364203] kvm: 3392: cpu0 unhandled rdmsr: 0xc0010001 Mar 28 00:17:53 vhost-server kernel: [ 174.093009] kvm: 3731: cpu0 unhandled rdmsr: 0xc0010112
Things seem to be running fine. Anyone have any idea what this is?
Not a bug: echo 1 > /sys/module/kvm/parameters/ignore_msrs