Public bug reported:
for :
Linux black 2.6.27-3-rt #1 PREEMPT RT Mon Oct 27 03:02:33 UTC 2008
x86_64 GNU/Linux
ii linux-image-2.6.27-3-rt 2.6.27-3.8
Linux kernel image for version 2.6.27 on Ingo Molnar's full real time
preemption
With the -generic kernel it detects two CPUs, but with this kernel I get
only one cpu (in htop for example) and the following in dmesg :
[ 29.021873] powernow-k8: Found 1 AMD Athlon(tm) 64 X2 Dual Core
Processor 3800+ processors (1 cpu cores) (version 2.20.00)
Here is $ more /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 15
model : 67
model name : AMD Athlon(tm) 64 X2 Dual Core Processor 3800+
stepping : 2
cpu MHz : 2000.000
cache size : 512 KB
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp
lm 3dnowext 3dnow rep_good nopl pni cx16 lahf_lm cmp_legacy svm extapic
cr8_legacy
bogomips : 4009.06
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc
** Affects: linux-meta-rt (Ubuntu)
Importance: Undecided
Status: New
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kernel only detects one CPU when there should be two
https://bugs.launchpad.net/bugs/291600
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