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author | Ingo Molnar <mingo@elte.hu> | 2007-07-09 16:51:59 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2007-07-09 16:51:59 (GMT) |
commit | e05606d3301525aa67b081ad9fccade2b31ab35a (patch) | |
tree | 2a3e5a477dfca70ce32f3ea8dbc5e16034c98c23 /include | |
parent | 138a8aeb5b9e5c5abd5e5ec22b6d1848e7e9c50b (diff) | |
download | linux-e05606d3301525aa67b081ad9fccade2b31ab35a.tar.xz |
sched: clean up the rt priority macros
clean up the rt priority macros, pointed out by Andrew Morton.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/sched.h | 61 |
1 files changed, 36 insertions, 25 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 3e7f189..4dcc61c 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -525,31 +525,6 @@ struct signal_struct { #define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */ #define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */ - -/* - * 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 rt_prio(prio) unlikely((prio) < MAX_RT_PRIO) -#define rt_task(p) rt_prio((p)->prio) -#define batch_task(p) (unlikely((p)->policy == SCHED_BATCH)) -#define is_rt_policy(p) ((p) != SCHED_NORMAL && (p) != SCHED_BATCH) -#define has_rt_policy(p) unlikely(is_rt_policy((p)->policy)) - /* * Some day this will be a full-fledged user tracking system.. */ @@ -1164,6 +1139,42 @@ struct task_struct { #endif }; +/* + * 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) +{ + if (unlikely(prio < MAX_RT_PRIO)) + return 1; + return 0; +} + +static inline int rt_task(struct task_struct *p) +{ + return rt_prio(p->prio); +} + +static inline int batch_task(struct task_struct *p) +{ + return p->policy == SCHED_BATCH; +} + static inline pid_t process_group(struct task_struct *tsk) { return tsk->signal->pgrp; |