netdev - Re: [PATCH v3 bpf-next 0/4] Add support for cgroup bpf

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Message-ID: <869adb74-5192-563d-0e8a-9cb578b2a601@solarflare.com>
Date:   Tue, 31 Mar 2020 22:51:49 +0100
From:   Edward Cree <ecree@...arflare.com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>,
        David Ahern <dsahern@...il.com>
CC:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Andrii Nakryiko <andriin@...com>, bpf <bpf@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrey Ignatov <rdna@...com>, Kernel Team <kernel-team@...com>
Subject: Re: [PATCH v3 bpf-next 0/4] Add support for cgroup bpf_link

On 31/03/2020 04:54, Andrii Nakryiko wrote:
> No need to kill random processes, you can kill only those that hold
> bpf_link FD. You can find them using drgn tool with script like [0].
For the record, I find the argument "we don't need a query feature,
 because you can just use a kernel debugger" *utterly* *horrifying*.
Now, it seems to be moot, because Alexei has given other, better
 reasons why query doesn't need to land yet; but can we please not
 ever treat debugging interfaces as a substitute for proper APIs?

</scream>
-ed