vCPU hot-added to a RHEL6 system is not activated

Solution Verified - Updated -


  • When hot adding a new vCPU to a RHEL6.3 system it is not activated.
  • If the machine is freshly booted it works. But when the machine is up for more than 24 hours it does not work.


  • Red Hat Enterprise Linux (RHEL) 6

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In