tracing: Open tracer when ftrace_dump_on_oops is used

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With ftrace_dump_on_oops, we previously did not open the tracer in
question, sometimes causing the trace output to be useless.

For example, the function_graph tracer with tracing_thresh set dumped via
ftrace_dump_on_oops would show a series of '}' indented at different levels,
but no function names.

call trace->open() (and do a few other fixups copied from the normal dump
path) to make the output more intelligible.

Link: http://lkml.kernel.org/r/1382554197-16961-1-git-send-email-cody@linux.vnet.ibm.com

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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Cody P Schafer 2013-10-23 11:49:57 -07:00 • committed by Steven Rostedt

parent d562aff93b

commit b2f974d6af

1 changed files with 11 additions and 0 deletions

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kernel/trace/trace.c

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