On 10/29/2009 06:07 PM, Jan Kiszka wrote:
Question: When a VCPU migrates, what syncs the shared_msrs per-cpu vars before or after that, or why is this no problem?
The guest's msrs remain on the old cpu (until a new guest is switched in or we return to userspace). The guest msrs are loaded into the new cpu when vmx_save_host_state() is called as part or kvm_arch_vcpu_load().
I'm currently following the theory that guest_msrs contains some non-EFER entry with 0 value, but shared_msrs has a different index in the slot passed to kvm_set_shared_msr.
That's a global... -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. -- 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
