From: Steven Rostedt (Red Hat) <rostedt@goodmis.org>
Date: Tue, 30 Apr 2013 19:46:14 +0000 (-0400)
Subject: tracing: Add function probe to trigger a ftrace dump to console
X-Git-Tag: v3.11-rc1~33^2~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad71d889b88055e61e3970a6744a271a51a94f42;p=pandora-kernel.git

tracing: Add function probe to trigger a ftrace dump to console

Add the "dump" command to have the ftrace buffer dumped to console if
a function is hit. This is useful when debugging a tripple fault,
where you have an idea of a function that is called just before the
tripple fault occurs, and can tell ftrace to dump its content out
to the console before it continues.

Format is:

  <function>:dump

echo 'bad_address:dump' > /debug/tracing/set_ftrace_filter

To remove this:

echo '!bad_address:dump' > /debug/tracing/set_ftrace_filter

Requested-by: Luis Claudio R. Goncalves <lclaudio@uudg.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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