linux优先级问题

wawava

sched_rr,sched_fifo.优先级大小是怎么排的？我sched_get_priority_min值是1，优先级最大是1还是99？
我看网上有说99是优先级最大的，也有说1是最大的。我内核中的注释是这样的
/*
* Priority of a process goes from 0..MAX_PRIO-1, valid RT
* priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
* tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority
* values are inverted: lower p->prio value means higher priority.
*
* The MAX_USER_RT_PRIO value allows the actual maximum
* RT priority to be separate from the value exported to
* user-space. This allows kernel threads to set their
* priority to a value higher than any user task. Note:
* MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.
*/

#define MAX_USER_RT_PRIO 100
#define MAX_RT_PRIO MAX_USER_RT_PRIO

#define MAX_PRIO (MAX_RT_PRIO + 40)
#define DEFAULT_PRIO (MAX_RT_PRIO + 20)

究竟优先级设成什么值最大？

omycle

lower value means higher priority.

另外，对于RT thread，优先级永远高于Normal thread的。