GUC_SCHED_PRIORITY_NORMAL
priority == GUC_SCHED_PRIORITY_NORMAL ? "(normal)" :
priority != GUC_SCHED_PRIORITY_NORMAL :
priority = enable ? GUC_SCHED_PRIORITY_NORMAL : GUC_SCHED_PRIORITY_LOW;
sched_if_idle = prio == GUC_SCHED_PRIORITY_NORMAL;
[GUC_SCHED_PRIORITY_NORMAL] = "normal",