On 31/03/2016 15:12, Peter Lieven wrote: >> >>> KVM does not let you read or write this MSR if the corresponding CPUID >>> bit is not set. This in turn causes MSRs that come after MSR_TSC_AUX >>> to be ignored by KVM_SET_MRSS. > > Is it possible that this causes a freeze when migrating vom qemu 2.2.0 > to 2.5.1?
I wouldn't exclude it if the CPU model is Westmere or earlier. Paolo
