Comment 4 for bug 1593605

When I change qemu version from 2.1.2 to 2.6.0. The vcpu0 will return 0 qemu.
I got strace like this:
strace -p 1180
Process 1180 attached - interrupt to quit
rt_sigtimedwait([BUS USR1], 0x7f719b5fa960, {0, 0}, 8) = -1 EAGAIN (Resource temporarily unavailable)
rt_sigpending([]) = 0
futex(0x55669f356d60, FUTEX_WAKE_PRIVATE, 1) = 1
ioctl(26, KVM_RUN

The kvm tracing like this:
             kvm-1180 [018] d... 63148.545821: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.545944: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.545948: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.546083: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.546085: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.546200: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.546202: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.546317: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.546320: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.546436: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.546439: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.546553: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.546556: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.546689: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.546691: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.546807: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.546810: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.546927: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.546930: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.547067: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.547070: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.547186: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.547189: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.547304: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000fd
             kvm-1180 [018] d... 63148.547307: kvm_entry: vcpu 0
             kvm-1180 [018] d... 63148.547384: kvm_exit: reason EXTERNAL_INTERRUPT rip 0xbf68f16f info 0 800000ef
             kvm-1180 [018] d... 63148.547391: kvm_entry: vcpu 0