We can't create vm on a physical server with 64 CPU(as reported by /proc/cpuinfo). The error message is: "cannot set CPU affinity on process 0"
The following is the capabilities detected by libvirt:
<arch>x86_64</arch>
<model>Westmere</model>
<vendor>Intel</vendor>
<topology sockets='4' cores='10' threads='2'/>
I wonder if libvirt uses incorrect CPU topology information to set process affinity which lead to the error above.