This is a note to let you know that I've just added the patch titled
tracing: Have tracing_off() actually turn tracing off
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tracing-have-tracing_off-actually-turn-tracing-off.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From f2bf1f6f5f89d031245067512449fc889b2f4bb2 Mon Sep 17 00:00:00 2001
From: Steven Rostedt <[email protected]>
Date: Wed, 6 Jun 2012 19:50:40 -0400
Subject: tracing: Have tracing_off() actually turn tracing off
From: Steven Rostedt <[email protected]>
commit f2bf1f6f5f89d031245067512449fc889b2f4bb2 upstream.
A recent update to have tracing_on/off() only affect the ftrace ring
buffers instead of all ring buffers had a cut and paste error.
The tracing_off() did the exact same thing as tracing_on() and
would not actually turn off tracing. Unfortunately, tracing_off()
is more important to be working than tracing_on() as this is a key
development tool, as it lets the developer turn off tracing as soon
as a problem is discovered. It is also used by panic and oops code.
This bug also breaks the 'echo func:traceoff > set_ftrace_filter'
Signed-off-by: Steven Rostedt <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
kernel/trace/trace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -383,7 +383,7 @@ EXPORT_SYMBOL_GPL(tracing_on);
void tracing_off(void)
{
if (global_trace.buffer)
- ring_buffer_record_on(global_trace.buffer);
+ ring_buffer_record_off(global_trace.buffer);
/*
* This flag is only looked at when buffers haven't been
* allocated yet. We don't really care about the race
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/tracing-have-tracing_off-actually-turn-tracing-off.patch
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