- /* FIXME: Free `cpu_list' if it's not NULL */
- if ((status = host_processors (port_host, &cpu_list, &cpu_list_len)) != KERN_SUCCESS)
+ status = host_processors (port_host, &cpu_list, &cpu_list_len);
+ if (status == KERN_INVALID_ARGUMENT)
+ {
+ ERROR ("cpu plugin: Don't have a privileged host control port. "
+ "The most common cause for this problem is "
+ "that collectd is running without root "
+ "privileges, which are required to read CPU "
+ "load information. "
+ "<https://collectd.org/bugs/22>");
+ cpu_list_len = 0;
+ return (-1);
+ }
+ if (status != KERN_SUCCESS)