From: Steven Rostedt <srostedt@redhat.com>
Date: Wed, 14 Jan 2009 19:50:19 +0000 (-0500)
Subject: trace: stop all recording to ring buffer on ftrace_dump
X-Git-Tag: v2.6.29-rc4~81^2~3
X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=commitdiff_plain;h=a442e5e0a2011af5b2d1f118fee0a8f9079f1d88

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>
---

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 1a1c5a6..4d89e84 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) {