From: Xiangyang Zhang <xyz.sun.ok@xxxxxxxxx> The 'nmissed' column of the 'kprobe_profile' file for kretprobe is not showed correctly, kretprobe can be skipped by two reasons, shortage of kretprobe_instance which is counted by tk->rp.nmissed, and kprobe itself is missed by some reason, so to show the sum. Link: https://lkml.kernel.org/r/20220107150242.5019-1-xyz.sun.ok@xxxxxxxxx Cc: stable@xxxxxxxxxxxxxxx Fixes: 4a846b443b4e ("tracing/kprobes: Cleanup kprobe tracer code") Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Signed-off-by: Xiangyang Zhang <xyz.sun.ok@xxxxxxxxx> Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx> --- kernel/trace/trace_kprobe.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index f8c26ee72de3..3d85323278ed 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1170,15 +1170,18 @@ static int probes_profile_seq_show(struct seq_file *m, void *v) { struct dyn_event *ev = v; struct trace_kprobe *tk; + unsigned long nmissed; if (!is_trace_kprobe(ev)) return 0; tk = to_trace_kprobe(ev); + nmissed = trace_kprobe_is_return(tk) ? + tk->rp.kp.nmissed + tk->rp.nmissed : tk->rp.kp.nmissed; seq_printf(m, " %-44s %15lu %15lu\n", trace_probe_name(&tk->tp), trace_kprobe_nhit(tk), - tk->rp.kp.nmissed); + nmissed); return 0; } -- 2.33.0
