MAX_USER_RT_PRIO 1323 include/linux/sched.h #define MAX_RT_PRIO MAX_USER_RT_PRIO MAX_USER_RT_PRIO 5146 kernel/sched.c (p->mm && param->sched_priority > MAX_USER_RT_PRIO-1) || MAX_USER_RT_PRIO 5680 kernel/sched.c ret = MAX_USER_RT_PRIO-1;