From mboxrd@z Thu Jan  1 00:00:00 1970
From: Namhyung Kim <namhyung@kernel.org>
Subject: Re: [PATCH 00/18] [ANNOUNCE] Dynamically created function based events
Date: Sun, 4 Feb 2018 11:25:20 +0900
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Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Ingo Molnar <mingo@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Tom Zanussi <tom.zanussi@linux.intel.com>,
        linux-rt-users <linux-rt-users@vger.kernel.org>,
        linux-trace-users <linux-trace-users@vger.kernel.org>,
        acme <acme@kernel.org>, Clark Williams <williams@redhat.com>,
        Jiri Olsa <jolsa@redhat.com>, bristot <bristot@redhat.com>,
        Juri Lelli <juri.lelli@redhat.com>,
        Jonathan Corbet <corbet@lwn.net>
To: Steven Rostedt <rostedt@goodmis.org>
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Hi Steve and Alexei,

On Sun, Feb 4, 2018 at 6:17 AM, Steven Rostedt <rostedt@goodmis.org> wrote:
> On Sat, 3 Feb 2018 12:52:08 -0800
> Alexei Starovoitov <alexei.starovoitov@gmail.com> wrote:
>
>> It's a user space job.
>
> BTW, I asked around at DevConf.cz, and nobody I talked with (besides
> Arnaldo), have used eBPF. The "path to hello world" is quite high. This
> interface is extremely simple to use, and one doesn't need to install
> LLVM or other tools to interface with it.
>
> I used the analogy, that eBPF is like C, and this is like Bash. One is
> much easier to get "Hello World!" out than the other.
>
> So personally, this is something I know I would use (note, I have
> never used eBPF either). But if I'm the only one to use this
> interface then I'll stop here (and not bother with the function graph
> return interface). If others think this would be helpful, I would ask
> them to speak up now.

I'm interested in this.  From my understanding, it's basically
function tracing + filter + custom argument info, right?

Supporting arguments with complex type could be error-prone.
We need to prevent malfunctions by invalid inputs.

Thanks,
Namhyung