Dynamic Reconfiguration User's Guide 2.5.1

2.1.1 CPU

CPU reconfiguration is a relatively simple task. Newly attached CPUs are automatically made available to the operating system. There is no requirement for this procedure.

To detach a CPU, these conditions must be satisfied.

• No process is bound to any outgoing CPUs
  All such processes must be stopped or unbound. Or such processes can be unbound automatically during DR operation by using the dr_conf command in connection scripts. Please refer to section 3.5 "DR service commands" for more details.
• No outgoing CPU belongs to any processor sets.
  All such CPUs must be removed from processor sets by psrset(1M).

If one of the above conditions is not satisfied, a DR command queries the administrator as to whether the DR operation can continue or not.