---

yaml --- r: 162955 b: refs/heads/master c: b5130b1 h: refs/heads/master i: 162953: a91e025 162951: 4a0ef65 v: v3
git-mirror · Sep 13, 2009 · 76995a8 · 76995a8
1 parent d94066d
commit 76995a8
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Showing 5 changed files with 15 additions and 5 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 41dfba4367109b92d92ec6e059be6950497d932f
+refs/heads/master: b5130b1e7d3717d03ab1916b198bf0d49fa0a619
diff --git a/trunk/kernel/trace/trace.c b/trunk/kernel/trace/trace.c
@@ -825,6 +825,11 @@ static void trace_init_cmdlines(void)
 	cmdline_idx = 0;
 }
 
+int is_tracing_stopped(void)
+{
+	return trace_stop_count;
+}
+
 /**
  * ftrace_off_permanent - disable all ftrace code permanently
  *

diff --git a/trunk/kernel/trace/trace.h b/trunk/kernel/trace/trace.h
@@ -461,6 +461,7 @@ void tracing_stop_sched_switch_record(void);
 void tracing_start_sched_switch_record(void);
 int register_tracer(struct tracer *type);
 void unregister_tracer(struct tracer *type);
+int is_tracing_stopped(void);
 
 extern unsigned long nsecs_to_usecs(unsigned long nsecs);
 

diff --git a/trunk/kernel/trace/trace_irqsoff.c b/trunk/kernel/trace/trace_irqsoff.c
@@ -157,8 +157,10 @@ check_critical_timing(struct trace_array *tr,
 
 	data->critical_end = parent_ip;
 
-	tracing_max_latency = delta;
-	update_max_tr_single(tr, current, cpu);
+	if (likely(!is_tracing_stopped())) {
+		tracing_max_latency = delta;
+		update_max_tr_single(tr, current, cpu);
+	}
 
 	max_sequence++;
 

diff --git a/trunk/kernel/trace/trace_sched_wakeup.c b/trunk/kernel/trace/trace_sched_wakeup.c
@@ -162,8 +162,10 @@ probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev,
 	if (!report_latency(delta))
 		goto out_unlock;
 
-	tracing_max_latency = delta;
-	update_max_tr(wakeup_trace, wakeup_task, wakeup_cpu);
+	if (likely(!is_tracing_stopped())) {
+		tracing_max_latency = delta;
+		update_max_tr(wakeup_trace, wakeup_task, wakeup_cpu);
+	}
 
 out_unlock:
 	__wakeup_reset(wakeup_trace);