From 020e5f85cb087a40572c8b8b2dd06292a14fa212 Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Wed, 1 Jul 2009 10:47:05 +0800 Subject: tracing/events: Add trace_event boot option We already have ftrace= boot option, and this adds a similar boot option for trace events, so allow trace events to be enabled at boot, for boot debugging purpose. Signed-off-by: Li Zefan Cc: Steven Rostedt Cc: Frederic Weisbecker LKML-Reference: <4A4ACE29.3010407@cn.fujitsu.com> Signed-off-by: Ingo Molnar --- Documentation/trace/events.txt | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'Documentation/trace/events.txt') diff --git a/Documentation/trace/events.txt b/Documentation/trace/events.txt index f157d7594ea7..2bcc8d4dea29 100644 --- a/Documentation/trace/events.txt +++ b/Documentation/trace/events.txt @@ -83,6 +83,15 @@ When reading one of these enable files, there are four results: X - there is a mixture of events enabled and disabled ? - this file does not affect any event +2.3 Boot option +--------------- + +In order to facilitate early boot debugging, use boot option: + + trace_event=[event-list] + +The format of this boot option is the same as described in section 2.1. + 3. Defining an event-enabled tracepoint ======================================= -- cgit v1.2.1