Re: [PATCH v3 perf,bpf 08/11] perf, bpf: save btf information as headers to perf.data

Namhyung Kim
2019-02-17T14:58:34Z

Hi,

On Sat, Feb 16, 2019 at 6:55 AM Song Liu <songliubraving@fb.com> wrote:
>
> This patch enables perf-record to save btf information as headers to
> perf.data A new header type HEADER_BTF is introduced for this data.
>
> Signed-off-by: Song Liu <songliubraving@fb.com>
> ---

[SNIP]
> +static void print_btf(struct feat_fd *ff, FILE *fp)
> +{
> + struct perf_env *env = &ff->ph->env;
> + struct rb_root *root;
> + struct rb_node *next;
> +
> + down_read(&env->bpf_progs.bpf_info_lock);
> +
> + root = &env->bpf_progs.btfs;
> + next = rb_first(root);
> +
> + while (next) {
> + struct btf_node *node;
> +
> + node = rb_entry(next, struct btf_node, rb_node);
> + next = rb_next(&node->rb_node);
> + fprintf(fp, "# bpf_prog_info of id %u\n", node->id);

How about saying it's "btf" info?

Thanks,
Namhyung

> + }
> +
> + up_read(&env->bpf_progs.bpf_info_lock);
> +}