sched: fix tracepoints in scheduler
The trace point only caught one of many places where a task changes cpu,
put it in the right place to we get all of them.
Change the signature while we're at it.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/trace/sched.h b/include/trace/sched.h
index 9b2854a..f4549d5 100644
--- a/include/trace/sched.h
+++ b/include/trace/sched.h
@@ -30,8 +30,8 @@
TPARGS(rq, prev, next));
DECLARE_TRACE(sched_migrate_task,
- TPPROTO(struct rq *rq, struct task_struct *p, int dest_cpu),
- TPARGS(rq, p, dest_cpu));
+ TPPROTO(struct task_struct *p, int orig_cpu, int dest_cpu),
+ TPARGS(p, orig_cpu, dest_cpu));
DECLARE_TRACE(sched_process_free,
TPPROTO(struct task_struct *p),
diff --git a/kernel/sched.c b/kernel/sched.c
index 7729c4b..d377097 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1851,6 +1851,8 @@
clock_offset = old_rq->clock - new_rq->clock;
+ trace_sched_migrate_task(p, task_cpu(p), new_cpu);
+
#ifdef CONFIG_SCHEDSTATS
if (p->se.wait_start)
p->se.wait_start -= clock_offset;
@@ -2868,7 +2870,6 @@
|| unlikely(!cpu_active(dest_cpu)))
goto out;
- trace_sched_migrate_task(rq, p, dest_cpu);
/* force the process onto the specified CPU */
if (migrate_task(p, dest_cpu, &req)) {
/* Need to wait for migration thread (might exit: take ref). */