CPU cores disable not working properly

Solution Verified - Updated -

Issue

  • CPU cores disable not working properly
  • Due to third-party software licensing, I need to disable half the cores (eg: 2 x 4-cores will be active)
  • Cores are disabled from BIOS, and the POST screen clearly shows 2 x 4 cores are active, but the OS sees only 2 x 2 cores

Environment

  • Red Hat Enterprise Linux 5.10
  • HP BL465c G8 with 2x AMD Opteron 6328 Processor

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