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| author |   Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2017-10-04 17:49:00 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2017-10-10 11:45:38 +0200 |
| commit | ff0d4a9dc16b1f4c954f6407c233ab848bdfe8b0 (patch) | |
| tree | abce24d2e7e9f64bd7e9f281a12558044ec6bee2 | |
| parent | sched/fair: Fix usage of find_idlest_group() when the local group is idlest (diff) | |
| download | linux-dev-ff0d4a9dc16b1f4c954f6407c233ab848bdfe8b0.tar.xz linux-dev-ff0d4a9dc16b1f4c954f6407c233ab848bdfe8b0.zip | |
sched/rt: Add a helper to test for a RT task
This helper returns true if a task has elevated priority which is true
for RT tasks (SCHED_RR and SCHED_FIFO) and also for SCHED_DEADLINE.
A task which runs at RT priority due to PI-boosting is not considered as
one with elevated priority.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jens Axboe <axboe@fb.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20171004154901.26904-1-bigeasy@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | include/linux/sched/rt.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/sched/rt.h b/include/linux/sched/rt.h index f93329aba31a..133001627ba1 100644 --- a/include/linux/sched/rt.h +++ b/include/linux/sched/rt.h @@ -17,6 +17,17 @@ static inline int rt_task(struct task_struct *p) return rt_prio(p->prio); } +static inline bool task_is_realtime(struct task_struct *tsk) +{ + int policy = tsk->policy; + + if (policy == SCHED_FIFO || policy == SCHED_RR) + return true; + if (policy == SCHED_DEADLINE) + return true; + return false; +} + #ifdef CONFIG_RT_MUTEXES /* * Must hold either p->pi_lock or task_rq(p)->lock. |