diff options
author | Ingo Molnar <mingo@elte.hu> | 2007-07-09 12:51:59 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2007-07-09 12:51:59 -0400 |
commit | e05606d3301525aa67b081ad9fccade2b31ab35a (patch) | |
tree | 2a3e5a477dfca70ce32f3ea8dbc5e16034c98c23 /include | |
parent | 138a8aeb5b9e5c5abd5e5ec22b6d1848e7e9c50b (diff) |
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 3e7f1890e55d..4dcc61cca00a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h | |||
@@ -525,31 +525,6 @@ struct signal_struct { | |||
525 | #define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */ | 525 | #define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */ |
526 | #define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */ | 526 | #define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */ |
527 | 527 | ||
528 | |||
529 | /* | ||
530 | * Priority of a process goes from 0..MAX_PRIO-1, valid RT | ||
531 | * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH | ||
532 | * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority | ||
533 | * values are inverted: lower p->prio value means higher priority. | ||
534 | * | ||
535 | * The MAX_USER_RT_PRIO value allows the actual maximum | ||
536 | * RT priority to be separate from the value exported to | ||
537 | * user-space. This allows kernel threads to set their | ||
538 | * priority to a value higher than any user task. Note: | ||
539 | * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO. | ||
540 | */ | ||
541 | |||
542 | #define MAX_USER_RT_PRIO 100 | ||
543 | #define MAX_RT_PRIO MAX_USER_RT_PRIO | ||
544 | |||
545 | #define MAX_PRIO (MAX_RT_PRIO + 40) | ||
546 | |||
547 | #define rt_prio(prio) unlikely((prio) < MAX_RT_PRIO) | ||
548 | #define rt_task(p) rt_prio((p)->prio) | ||
549 | #define batch_task(p) (unlikely((p)->policy == SCHED_BATCH)) | ||
550 | #define is_rt_policy(p) ((p) != SCHED_NORMAL && (p) != SCHED_BATCH) | ||
551 | #define has_rt_policy(p) unlikely(is_rt_policy((p)->policy)) | ||
552 | |||
553 | /* | 528 | /* |
554 | * Some day this will be a full-fledged user tracking system.. | 529 | * Some day this will be a full-fledged user tracking system.. |
555 | */ | 530 | */ |
@@ -1164,6 +1139,42 @@ struct task_struct { | |||
1164 | #endif | 1139 | #endif |
1165 | }; | 1140 | }; |
1166 | 1141 | ||
1142 | /* | ||
1143 | * Priority of a process goes from 0..MAX_PRIO-1, valid RT | ||
1144 | * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH | ||
1145 | * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority | ||
1146 | * values are inverted: lower p->prio value means higher priority. | ||
1147 | * | ||
1148 | * The MAX_USER_RT_PRIO value allows the actual maximum | ||
1149 | * RT priority to be separate from the value exported to | ||
1150 | * user-space. This allows kernel threads to set their | ||
1151 | * priority to a value higher than any user task. Note: | ||
1152 | * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO. | ||
1153 | */ | ||
1154 | |||
1155 | #define MAX_USER_RT_PRIO 100 | ||
1156 | #define MAX_RT_PRIO MAX_USER_RT_PRIO | ||
1157 | |||
1158 | #define MAX_PRIO (MAX_RT_PRIO + 40) | ||
1159 | #define DEFAULT_PRIO (MAX_RT_PRIO + 20) | ||
1160 | |||
1161 | static inline int rt_prio(int prio) | ||
1162 | { | ||
1163 | if (unlikely(prio < MAX_RT_PRIO)) | ||
1164 | return 1; | ||
1165 | return 0; | ||
1166 | } | ||
1167 | |||
1168 | static inline int rt_task(struct task_struct *p) | ||
1169 | { | ||
1170 | return rt_prio(p->prio); | ||
1171 | } | ||
1172 | |||
1173 | static inline int batch_task(struct task_struct *p) | ||
1174 | { | ||
1175 | return p->policy == SCHED_BATCH; | ||
1176 | } | ||
1177 | |||
1167 | static inline pid_t process_group(struct task_struct *tsk) | 1178 | static inline pid_t process_group(struct task_struct *tsk) |
1168 | { | 1179 | { |
1169 | return tsk->signal->pgrp; | 1180 | return tsk->signal->pgrp; |