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Commit 0f67f04f authored by Steven Rostedt (Red Hat)'s avatar Steven Rostedt (Red Hat) Committed by Steven Rostedt
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tracing: Only create tracer options files if directory exists 



Do not bother creating tracer options if no tracing directory
exists. If a tracer is enabled via the command line, and is
started before the tracing directory is created, then it wont have
its tracer specific options created.

Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent dfbc1534

kernel/trace/trace.c

+5 −2
Original line number Diff line number Diff line
@@ -4172,8 +4172,11 @@ static int tracing_set_tracer(struct trace_array *tr, const char *buf) 
		free_snapshot(tr);

	}

#endif

	/* Currently, only the top instance has options */

	if (tr->flags & TRACE_ARRAY_FL_GLOBAL) {

	/*

	 * Only enable if the directory has been created already.

	 * Currently, only the top instance has options

	 */

	if (tr->dir && tr->flags & TRACE_ARRAY_FL_GLOBAL) {

		destroy_trace_option_files(topts);

		topts = create_trace_option_files(tr, t);

	}