Commit 5c228079 authored by Dongsheng Yang's avatar Dongsheng Yang Committed by Ingo Molnar

sched: Move the priority specific bits into a new header file

Some bits about priority are defined in linux/sched/rt.h, but
some of them are not only for rt scheduler, such as MAX_PRIO.

This patch move them all into a new header file, linux/sched/prio.h.
Signed-off-by: default avatarDongsheng Yang <yangds.fnst@cn.fujitsu.com>
Cc: clark.williams@gmail.com
Cc: rostedt@goodmis.org
Cc: raistlin@linux.it
Cc: juri.lelli@gmail.com
Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/f7549508a1588da2c613d601748ca9de30fa5dcf.1390859827.git.yangds.fnst@cn.fujitsu.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 390f3258
...@@ -3,6 +3,8 @@ ...@@ -3,6 +3,8 @@
#include <uapi/linux/sched.h> #include <uapi/linux/sched.h>
#include <linux/sched/prio.h>
struct sched_param { struct sched_param {
int sched_priority; int sched_priority;
......
#ifndef _SCHED_PRIO_H
#define _SCHED_PRIO_H
/*
* 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)
#endif /* _SCHED_PRIO_H */
#ifndef _SCHED_RT_H #ifndef _SCHED_RT_H
#define _SCHED_RT_H #define _SCHED_RT_H
/* #include <linux/sched/prio.h>
* 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)
static inline int rt_prio(int prio) static inline int rt_prio(int prio)
{ {
......
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