On Thu, Sep 7, 2023 at 12:13 AM Jiri Olsa <jolsa@xxxxxxxxxx> wrote:
nit: The subject doesn't state "missed stats".
>
> Adding support to gather missed stats for kprobe_multi
> programs due to bpf_prog_active protection.
>
> Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Other than that
Reviewed-and-tested-by: Song Liu <song@xxxxxxxxxx>
> ---
> kernel/trace/bpf_trace.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
> index a7264b2c17ad..279a3d370812 100644
> --- a/kernel/trace/bpf_trace.c
> +++ b/kernel/trace/bpf_trace.c
> @@ -2710,6 +2710,7 @@ kprobe_multi_link_prog_run(struct bpf_kprobe_multi_link *link,
> int err;
>
> if (unlikely(__this_cpu_inc_return(bpf_prog_active) != 1)) {
> + bpf_prog_inc_misses_counter(link->link.prog);
> err = 0;
> goto out;
> }
> --
> 2.41.0
>
>
