linux-kernel - Re: [RFC 00/13] kprobe/bpf: Add support to attach multiple kprobes

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Message-ID: <20220106100254.29920bcf@gandalf.local.home>
Date:   Thu, 6 Jan 2022 10:02:54 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>,
        Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [RFC 00/13] kprobe/bpf: Add support to attach multiple kprobes

On Thu, 6 Jan 2022 22:59:43 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> > at the moment there's not ftrace public interface for the return
> > probe merged in, so to get the kretprobe working I had to use
> > kprobe interface  
> 
> Yeah, I found that too. We have to ask Steve to salvage it ;)

I have one more week of being unemployed (and I'm done with my office
renovation), so perhaps I'll start looking into this.

This was the work to merge function graph tracer with kretprobes, right?

-- Steve