From 5c228079ce8a9bb043a423069a6674dfb9268037 Mon Sep 17 00:00:00 2001 From: Dongsheng Yang Date: Mon, 27 Jan 2014 17:15:37 -0500 Subject: 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: Dongsheng Yang Cc: clark.williams@gmail.com Cc: rostedt@goodmis.org Cc: raistlin@linux.it Cc: juri.lelli@gmail.com Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/f7549508a1588da2c613d601748ca9de30fa5dcf.1390859827.git.yangds.fnst@cn.fujitsu.com Signed-off-by: Ingo Molnar --- include/linux/sched/prio.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 include/linux/sched/prio.h (limited to 'include/linux/sched/prio.h') diff --git a/include/linux/sched/prio.h b/include/linux/sched/prio.h new file mode 100644 index 000000000000..9382ba84d5d0 --- /dev/null +++ b/include/linux/sched/prio.h @@ -0,0 +1,23 @@ +#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 */ -- cgit v1.2.3