netdev - Re: [PATCH] tracepoint: Add tracepoint_probe_register_may

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Message-ID: <20210707200544.1fbfd42b@rorschach.local.home>
Date:   Wed, 7 Jul 2021 20:05:44 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        syzbot+721aa903751db87aa244@...kaller.appspotmail.com,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Ingo Molnar <mingo@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        netdev <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH] tracepoint: Add tracepoint_probe_register_may_exist()
 for BPF tracing

On Wed, 7 Jul 2021 16:49:26 -0700
Andrii Nakryiko <andrii.nakryiko@...il.com> wrote:

> As for why the user might need that, it's up to the user and I don't
> want to speculate because it will always sound contrived without a
> specific production use case. But people are very creative and we try
> not to dictate how and what can be done if it doesn't break any
> fundamental assumption and safety.

I guess it doesn't matter, because if they try to do it, the second
attachment will simply fail to attach.

-- Steve