Commit-ID: ff0d4a9dc16b1f4c954f6407c233ab848bdfe8b0
Gitweb: https://git.kernel.org/tip/ff0d4a9dc16b1f4c954f6407c233ab848bdfe8b0
Author: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
AuthorDate: Wed, 4 Oct 2017 17:49:00 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 10 Oct 2017 11:45:38 +0200
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@xxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20171004154901.26904-1-bigeasy@xxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
include/linux/sched/rt.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/linux/sched/rt.h b/include/linux/sched/rt.h
index f93329a..1330016 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.
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|