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ftrace/kprobe: Show the maxactive number on kprobe_events
commit 6a13a0d7b4d1171ef9b80ad69abc37e1daa941b3 upstream.
Show maxactive parameter on kprobe_events.
This allows user to save the current configuration and
restore it without losing maxactive parameter.
Link: http://lkml.kernel.org/r/4762764a-6df7-bc93-ed60-e336146dce1f@gmail.com
Link: http://lkml.kernel.org/r/158503528846.22706.5549974121212526020.stgit@devnote2
Cc: stable@vger.kernel.org
Fixes: 696ced4fb1
("tracing/kprobes: expose maxactive for kretprobe in kprobe_events")
Reported-by: Taeung Song <treeze.taeung@gmail.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -918,6 +918,8 @@ static int trace_kprobe_show(struct seq_file *m, struct dyn_event *ev)
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int i;
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seq_putc(m, trace_kprobe_is_return(tk) ? 'r' : 'p');
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if (trace_kprobe_is_return(tk) && tk->rp.maxactive)
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seq_printf(m, "%d", tk->rp.maxactive);
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seq_printf(m, ":%s/%s", trace_probe_group_name(&tk->tp),
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trace_probe_name(&tk->tp));
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