linux-kernel - Re: [PATCHv2] ftrace: Show all functions with addresses in available_filter_functions

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Message-ID: <20230612110222.50c254f3@gandalf.local.home>
Date:   Mon, 12 Jun 2023 11:02:22 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Yonghong Song <yhs@...a.com>
Cc:     Jiri Olsa <jolsa@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Andrii Nakryiko <andrii@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        linux-trace-kernel@...r.kernel.org, bpf@...r.kernel.org,
        Andrii Nakryiko <andrii.nakryiko@...il.com>,
        Jackie Liu <liu.yun@...ux.dev>
Subject: Re: [PATCHv2] ftrace: Show all functions with addresses in
 available_filter_functions_addrs

On Mon, 12 Jun 2023 07:49:53 -0700
Yonghong Song <yhs@...a.com> wrote:

> I am actually interested in how available_filter_functions_addrs
> will be used. For example, bpf_program__attach_kprobe_multi_opts()
> can already take addresses from kallsyms. How to use
> available_filter_functions_addrs to facilitate kprobe_multi?
> Do we need to change kernel APIs? It would be great at least we
> got a RFC patch to answer these questions.

I agree, having that information would also be useful to me.

Jiri? Andrii?

-- Steve