linux-kernel - [PATCH] doc: clarify that trace_events= takes a comma-separated list

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Date:	Mon, 23 May 2016 13:08:31 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	<linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	Brian Norris <computersforpeace@...il.com>,
	Jonathan Corbet <corbet@....net>,
	Li Zefan <lizf@...fujitsu.com>
Subject: [PATCH] doc: clarify that trace_events= takes a comma-separated list

It took me browsing through the source code to determine that I was,
indeed, using the wrong delimiter in my command lines. So I might as
well document it for the next person.

Signed-off-by: Brian Norris <computersforpeace@...il.com>
---
 Documentation/kernel-parameters.txt | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 5349363b603c..594bf50b8f81 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -3994,7 +3994,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
 	trace_event=[event-list]
 			[FTRACE] Set and start specified trace events in order
-			to facilitate early boot debugging.
+			to facilitate early boot debugging. The event-list is a
+			comma separated list of trace events to enable, as if
+			you were to append the event(s) to
+
+			    /sys/kernel/debug/tracing/set_event
+
 			See also Documentation/trace/events.txt
 
 	trace_options=[option-list]
-- 
2.8.0.rc3.226.g39d4020