Why is only 1 processor recognized in an SMP machine?

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Commonly, if a Linux instalation only recognizes 1 processor in a Symmetric Multiprocessor (SMP) system, the cause is one or more of the following:

  1. Incorrect BIOS settings

  2. Use of a uni-processor (UP) kernel image

  3. Mismatched Processors

To correct this, ensure that your BIOS settings enable all of the processors in your syst...

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