tracing: Apply soft-disabled and filter to tracepoints printk (d8d0c245) · Commits · 戴 / test

Apply soft-disabled and the filter rule of the trace events to the printk output of tracepoints (a.k.a. tp_printk kernel parameter) as same as trace buffer output. Link: http://lkml.kernel.org/r/157867231876.17873.15825819592284704068.stgit@devnote2 Signed-off-by:

kernel/trace/trace.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -2610,6 +2610,7 @@ static DEFINE_MUTEX(tracepoint_printk_mutex);
		static void output_printk(struct trace_event_buffer *fbuffer)
		{
		struct trace_event_call *event_call;
		struct trace_event_file *file;
		struct trace_event *event;
		unsigned long flags;
		struct trace_iterator *iter = tracepoint_print_iter;
		@@ -2623,6 +2624,12 @@ static void output_printk(struct trace_event_buffer *fbuffer)
		!event_call->event.funcs->trace)
		return;

		file = fbuffer->trace_file;
		if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &file->flags) \|\|
		(unlikely(file->flags & EVENT_FILE_FL_FILTERED) &&
		!filter_match_preds(file->filter, fbuffer->entry)))
		return;

		event = &fbuffer->trace_file->event_call->event;

		spin_lock_irqsave(&tracepoint_iter_lock, flags);