From a442e5e0a2011af5b2d1f118fee0a8f9079f1d88 Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Wed, 14 Jan 2009 14:50:19 -0500
Subject: [PATCH] trace: stop all recording to ring buffer on ftrace_dump
Impact: limit ftrace dump output
Currently ftrace_dump only calls ftrace_kill that is a fast way
to prevent the function tracer functions from being called (just sets
a flag and clears the function to call, nothing else). It is better
to also turn off any recording to the ring buffers as well.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
kernel/trace/trace.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 1a1c5a6ab24e..4d89e84f0f4b 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3770,6 +3770,7 @@ void ftrace_dump(void)
dump_ran = 1;
/* No turning back! */
+ tracing_off();
ftrace_kill();
for_each_tracing_cpu(cpu) {
--
2.20.1