The following commit has been merged into the sched/core branch of tip:
Commit-ID: 18adad1dac3334ed34f60ad4de2960df03058142
Gitweb: https://git.kernel.org/tip/18adad1dac3334ed34f60ad4de2960df03058142
Author: Connor O'Brien <connoro@xxxxxxxxxx>
AuthorDate: Wed, 09 Oct 2024 16:53:38 -07:00
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Mon, 14 Oct 2024 12:52:41 +02:00
sched: Consolidate pick_*_task to task_is_pushable helper
This patch consolidates rt and deadline pick_*_task functions to
a task_is_pushable() helper
This patch was broken out from a larger chain migration
patch originally by Connor O'Brien.
[jstultz: split out from larger chain migration patch,
renamed helper function]
Signed-off-by: Connor O'Brien <connoro@xxxxxxxxxx>
Signed-off-by: John Stultz <jstultz@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Metin Kaya <metin.kaya@xxxxxxx>
Reviewed-by: Valentin Schneider <vschneid@xxxxxxxxxx>
Reviewed-by: Christian Loehle <christian.loehle@xxxxxxx>
Tested-by: K Prateek Nayak <kprateek.nayak@xxxxxxx>
Tested-by: Metin Kaya <metin.kaya@xxxxxxx>
Link: https://lore.kernel.org/r/20241009235352.1614323-6-jstultz@xxxxxxxxxx
---
kernel/sched/deadline.c | 10 +---------
kernel/sched/rt.c | 11 +----------
kernel/sched/sched.h | 10 ++++++++++
3 files changed, 12 insertions(+), 19 deletions(-)
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 4acf5e3..a4683f8 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -2487,14 +2487,6 @@ static void task_fork_dl(struct task_struct *p)
/* Only try algorithms three times */
#define DL_MAX_TRIES 3
-static int pick_dl_task(struct rq *rq, struct task_struct *p, int cpu)
-{
- if (!task_on_cpu(rq, p) &&
- cpumask_test_cpu(cpu, &p->cpus_mask))
- return 1;
- return 0;
-}
-
/*
* Return the earliest pushable rq's task, which is suitable to be executed
* on the CPU, NULL otherwise:
@@ -2513,7 +2505,7 @@ next_node:
if (next_node) {
p = __node_2_pdl(next_node);
- if (pick_dl_task(rq, p, cpu))
+ if (task_is_pushable(rq, p, cpu))
return p;
next_node = rb_next(next_node);
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index e2506ab..c5c22fc 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -1773,15 +1773,6 @@ static void put_prev_task_rt(struct rq *rq, struct task_struct *p, struct task_s
/* Only try algorithms three times */
#define RT_MAX_TRIES 3
-static int pick_rt_task(struct rq *rq, struct task_struct *p, int cpu)
-{
- if (!task_on_cpu(rq, p) &&
- cpumask_test_cpu(cpu, &p->cpus_mask))
- return 1;
-
- return 0;
-}
-
/*
* Return the highest pushable rq's task, which is suitable to be executed
* on the CPU, NULL otherwise
@@ -1795,7 +1786,7 @@ static struct task_struct *pick_highest_pushable_task(struct rq *rq, int cpu)
return NULL;
plist_for_each_entry(p, head, pushable_tasks) {
- if (pick_rt_task(rq, p, cpu))
+ if (task_is_pushable(rq, p, cpu))
return p;
}
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 71ce1b0..4493352 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -3799,6 +3799,16 @@ void move_queued_task_locked(struct rq *src_rq, struct rq *dst_rq, struct task_s
set_task_cpu(task, dst_rq->cpu);
activate_task(dst_rq, task, 0);
}
+
+static inline
+bool task_is_pushable(struct rq *rq, struct task_struct *p, int cpu)
+{
+ if (!task_on_cpu(rq, p) &&
+ cpumask_test_cpu(cpu, &p->cpus_mask))
+ return true;
+
+ return false;
+}
#endif
#ifdef CONFIG_RT_MUTEXES
|