Comment 44 for bug 795717

I could not reproduce booting the guest by setting processor affinity to a single host CPU.

1. Start 32-bit 2-CPU RHEL-5 compatible VM guest and pause on grub screen
2. locked it to host CPU #1
$ sudo taskset -p 0x00000001 3127
pid 3127's current affinity mask: 3f
pid 3127's new affinity mask: 1
3. Let the guest proceed booting from grub and it hung at a different time, right after displaying:
Time: kvm-clock clocksource has been installed.

gdahlman probably mean single guest CPU not single host CPU.