## processor_set_policy_disable

Function - Disables a scheduling policy for a processor set.

### SYNOPSIS

    #include< mach/mach_host.h>

    kern_return_t	processor_set_policy_disable
    		(processor_set_t	processor_set,
    		int	policy,
    		boolean_t	change_threads);

### PARAMETERS

processor_set
  [in processor-set-control port] The control port for the processor set for which a scheduling policy is to be disabled.
policy
  [in scalar] Policy to be disabled. The values currently defined are POLICY_TIMESHARE and POLICY_FIXEDPRI.
change_threads
  [in scalar] If true, causes the scheduling policy for all threads currently running with policy to POLICY_TIMESHARE.

### DESCRIPTION

The processor_set_policy_disable function restricts the set of scheduling policies allowed for processor_set. The set of scheduling policies allowed for a processor set is the set of policies allowed to be set for threads assigned to that processor set. The current set of permitted policies can be obtained from processor_set_info. Timesharing may not be forbidden for any processor set. This is a compromise to reduce the complexity of the assign operation; any thread whose policy is forbidden by its target processor set has its policy reset to timesharing. Disabling a scheduling policy for a processor set has no effect on threads currently assigned to that processor set unless change_threads is TRUE, in which case their policies will be reset to timesharing.

### RETURN VALUES

Only generic errors apply.

### RELATED INFORMATION

Functions: processor_set_policy_enable, processor_set_info, thread_policy.