id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host
5728,CentOS 5.3 doesn't detect more than one CPU,Allan,,"Linux guests cannot detect more than one cpu although Intel-VTx is enabled on the machine and there is no other hypervisor running on the box.

VBoxManage showvminfo vb340 | grep -i cpu
Number of CPUs:  2
Synthetic Cpu:   off
CPUID overrides: None

inside the guest:

cat /proc/cpuinfo 
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 15
model name	: Intel(R) Core(TM)2 CPU          6400  @ 2.13GHz
stepping	: 2
cpu MHz		: 2126.725
cache size	: 0 KB
physical id	: 0
siblings	: 1
core id		: 0
cpu cores	: 1
apicid		: 0
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht constant_tsc up pni
bogomips	: 4253.45

There is only one!",defect,closed,guest smp,VirtualBox 3.1.0,fixed,,,Linux,Linux