From: Masami Hiramatsu mhiramat@kernel.org
[ Upstream commit 6a13a0d7b4d1171ef9b80ad69abc37e1daa941b3 ]
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@devnot...
Cc: stable@vger.kernel.org Fixes: 696ced4fb1d76 ("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: Sasha Levin sashal@kernel.org --- kernel/trace/trace_kprobe.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index ea20274a105ae..d66aed6e9c75f 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -877,6 +877,8 @@ static int probes_seq_show(struct seq_file *m, void *v) int i;
seq_putc(m, trace_kprobe_is_return(tk) ? 'r' : 'p'); + if (trace_kprobe_is_return(tk) && tk->rp.maxactive) + seq_printf(m, "%d", tk->rp.maxactive); seq_printf(m, ":%s/%s", tk->tp.call.class->system, trace_event_name(&tk->tp.call));