trace-add-tracepoint-to-rtmutex_setprio.patch

From e95c36b00d47bb9f0b11527fb22fbdbb7eeaff5f Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 3 Jul 2009 08:44:38 -0500
Subject: [PATCH] trace: add tracepoint to rtmutex_setprio()

commit 189b7ee6374b0c1ff0a49c4de055aec5d8303dbd in tip.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index cfceb0b..354e98f 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -235,6 +235,37 @@ DEFINE_EVENT(sched_process_template, sched_process_exit,
 	     TP_ARGS(p));
 
 /*
+ * Tracepoint for priority boosting/deboosting of a task:
+ *
+ * (NOTE: the 'rq' argument is not used by generic trace events,
+ *        but used by the latency tracer plugin. )
+ */
+TRACE_EVENT(sched_task_setprio,
+
+	TP_PROTO(struct rq *rq, struct task_struct *p, int oldprio),
+
+	TP_ARGS(rq, p, oldprio),
+
+	TP_STRUCT__entry(
+		__array(	char,	comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	pid			)
+		__field(	int,	prio			)
+		__field(	int,	oldprio			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+		__entry->pid		= p->pid;
+		__entry->prio		= p->prio;
+		__entry->oldprio	= oldprio;
+	),
+
+	TP_printk("task %s:%d [%d] oldprio=%d",
+		  __entry->comm, __entry->pid, __entry->prio,
+		  __entry->oldprio)
+);
+
+/*
  * Tracepoint for a waiting task:
  */
 TRACE_EVENT(sched_process_wait,
diff --git a/kernel/sched.c b/kernel/sched.c
index 07bc2d2..c19ddb3 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6089,6 +6089,8 @@ void task_setprio(struct task_struct *p, int prio)
 
 	p->prio = prio;
 
+	trace_sched_task_setprio(rq, p, oldprio);
+
 	if (running)
 		p->sched_class->set_curr_task(rq);
 	if (on_rq) {
-- 
1.7.1.1