Messages in this thread Patch in this message | | | Date | Mon, 19 May 2014 06:10:14 -0700 | From | tip-bot for Dongsheng Yang <> | Subject | [tip:sched/core] sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h. |
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Commit-ID: b482e5f5c22ef95ffe7c4d86fc9719455fb24bca Gitweb: http://git.kernel.org/tip/b482e5f5c22ef95ffe7c4d86fc9719455fb24bca Author: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> AuthorDate: Thu, 8 May 2014 18:33:48 +0900 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Mon, 19 May 2014 22:02:42 +0900
sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h.
This patch add two inline functions named nice_to_rlimit() and rlimit_to_nice() in prio.h. They are handle the convertion between nice value [19,-20] and rlimit style value [1,40].
Cc: mingo@redhat.com Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/e1f9c9f2023719e0738e16cd6807c74c68b08fad.1399532322.git.yangds.fnst@cn.fujitsu.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- include/linux/sched/prio.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/include/linux/sched/prio.h b/include/linux/sched/prio.h index ac32258..d9cf5a5 100644 --- a/include/linux/sched/prio.h +++ b/include/linux/sched/prio.h @@ -41,4 +41,20 @@ #define TASK_USER_PRIO(p) USER_PRIO((p)->static_prio) #define MAX_USER_PRIO (USER_PRIO(MAX_PRIO)) +/* + * Convert nice value [19,-20] to rlimit style value [1,40]. + */ +static inline long nice_to_rlimit(long nice) +{ + return (MAX_NICE - nice + 1); +} + +/* + * Convert rlimit style value [1,40] to nice value [-20, 19]. + */ +static inline long rlimit_to_nice(long prio) +{ + return (MAX_NICE - prio + 1); +} + #endif /* _SCHED_PRIO_H */
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