[PATCH 17/19] sched/numa: Pass destination cpu as a parameter to migrate_task_rq

Srikar Dronamraju
2018-06-04T10:01:38Z

This additional parameter (new_cpu) is used later for identifying if
task migration is across nodes.

No functional change.

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---
kernel/sched/core.c | 2 +-
kernel/sched/deadline.c | 2 +-
kernel/sched/fair.c | 2 +-
kernel/sched/sched.h | 2 +-
4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 68849c2..7ecd131 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1170,7 +1170,7 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu)

if (task_cpu(p) != new_cpu) {
if (p->sched_class->migrate_task_rq)
- p->sched_class->migrate_task_rq(p);
+ p->sched_class->migrate_task_rq(p, new_cpu);
p->se.nr_migrations++;
perf_event_task_migrate(p);
}
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index e7b3008..4f6b376 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1608,7 +1608,7 @@ static void yield_task_dl(struct rq *rq)
return cpu;
}

-static void migrate_task_rq_dl(struct task_struct *p)
+static void migrate_task_rq_dl(struct task_struct *p, int new_cpu __maybe_unused)
{
struct rq *rq;

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 6851412..339c3dc 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6616,7 +6616,7 @@ static int wake_cap(struct task_struct *p, int cpu, int prev_cpu)
* cfs_rq_of(p) references at time of call are still valid and identify the
* previous CPU. The caller guarantees p->pi_lock or task_rq(p)->lock is held.
*/
-static void migrate_task_rq_fair(struct task_struct *p)
+static void migrate_task_rq_fair(struct task_struct *p, int new_cpu __maybe_unused)
{
/*
* As blocked tasks retain absolute vruntime the migration needs to
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 55bc6e1..33ddea7 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1487,7 +1487,7 @@ struct sched_class {

#ifdef CONFIG_SMP
int (*select_task_rq)(struct task_struct *p, int task_cpu, int sd_flag, int flags);
- void (*migrate_task_rq)(struct task_struct *p);
+ void (*migrate_task_rq)(struct task_struct *p, int new_cpu);

void (*task_woken)(struct rq *this_rq, struct task_struct *task);

--
1.8.3.1