[Fedora-xen] CentOS 5 guest sees only one CPU

[Kyle Tucker]

Hi,
	We have set up Xen on Fedora Core 5 Domain0 with a CentOS 5 HVM. 
This is a Dell Poweredge SC1430 system. We've set vcpus=2 and it will 
only see one CPU. I've also tried setting cpus="1,2" or "6,7" to no avail. 
Here's what xm reports when I've set cpus="6,7".

# xm vcpu-list
Name ID VCPUs CPU State Time(s) CPU Affinity
Domain-0 0 0 6 -b- 3304.1 any cpu
Domain-0 0 1 1 -b- 245.0 any cpu
Domain-0 0 2 0 -b- 198.5 any cpu
Domain-0 0 3 5 -b- 901.3 any cpu
Domain-0 0 4 4 -b- 192.6 any cpu
Domain-0 0 5 2 -b- 236.0 any cpu
Domain-0 0 6 0 r-- 240.8 any cpu
Domain-0 0 7 3 -b- 200.9 any cpu
vm2 67 0 7 -b- 45.2 6-7
vm2 67 1 - --p 0.0 6-7

The following is in vm2's dmesg output, and I suspect the line about not 
detecting a SMP motherboard begins to point at the issue. Any thoughts on 
what's up? Thanks.

CPU: After generic identify, caps: 8fa9f9bf 00100000 00000000 00000000 0000e215 00000000 00000000
CPU: After vendor identify, caps: 8fa9f9bf 00100000 00000000 00000000 0000e215 00000000 00000000
CPU: L1 I cache: 32K, L1 D cache: 32K
CPU: L2 cache: 4096K
CPU: After all inits, caps: 8fa9f1bf 00100000 00000000 00000140 0000e215 00000000 00000000
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
Checking 'hlt' instruction... OK.
SMP alternatives: switching to UP code
Freeing SMP alternatives: 16k freed
CPU0: Intel(R) Xeon(R) CPU E5310 @ 1.60GHz stepping 07
SMP motherboard not detected.
Local APIC not detected. Using dummy APIC emulation.
Brought up 1 CPUs 

-- 
- Kyle 
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kylet at panix.com   http://www.panix.com/~kylet    
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