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Subject[PATCH] sched: fix tracepoint in scheduler.
Date
In function set_task_cpu(), if cpu == new_cpu,
there is no migration happen. But current trace point
will raise a migration trace event.

This patch change trace point to right place,
only when migration really happen, an event will
be threw out.

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
---
kernel/sched/core.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 9cae286..6708aff 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -998,9 +998,8 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
#endif
#endif

- trace_sched_migrate_task(p, new_cpu);
-
if (task_cpu(p) != new_cpu) {
+ trace_sched_migrate_task(p, new_cpu);
if (p->sched_class->migrate_task_rq)
p->sched_class->migrate_task_rq(p, new_cpu);
p->se.nr_migrations++;
--
1.8.2.1


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