commit 4ac3ba41d372e3a9e420b36bc43589662b188a14
author Ingo Molnar <mingo@elte.hu> Mon May 12 21:20:52 2008 +0200
committer Thomas Gleixner <tglx@linutronix.de> Fri May 23 21:07:31 2008 +0200
tree b8dd93a0226a92b5f55e5ff1e51712424a7be729
parent 1a3c3034336320554a3342572dae98d69e054fc7

ftrace: trace scheduler rbtree

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/trace/trace.c

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 65d2c0a..06380dc 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -129,6 +129,7 @@
 	"bin",
 	"block",
 	"stacktrace",
+	"sched-tree",
 	NULL
 };
 

kernel/trace/trace.h

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 75e2374..a520157 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -286,6 +286,7 @@
 	TRACE_ITER_BIN			= 0x40,
 	TRACE_ITER_BLOCK		= 0x80,
 	TRACE_ITER_STACKTRACE		= 0x100,
+	TRACE_ITER_SCHED_TREE		= 0x200,
 };
 
 #endif /* _LINUX_KERNEL_TRACE_H */

kernel/trace/trace_sched_switch.c

diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 12658b3..5555b90 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -36,7 +36,8 @@
 
 	if (likely(disabled == 1)) {
 		tracing_sched_switch_trace(tr, data, prev, next, flags);
-		ftrace_all_fair_tasks(__rq, tr, data);
+		if (trace_flags & TRACE_ITER_SCHED_TREE)
+			ftrace_all_fair_tasks(__rq, tr, data);
 	}
 
 	atomic_dec(&data->disabled);
@@ -62,7 +63,8 @@
 
 	if (likely(disabled == 1)) {
 		tracing_sched_wakeup_trace(tr, data, wakee, curr, flags);
-		ftrace_all_fair_tasks(__rq, tr, data);
+		if (trace_flags & TRACE_ITER_SCHED_TREE)
+			ftrace_all_fair_tasks(__rq, tr, data);
 	}
 
 	atomic_dec(&data->disabled);