linux-kernel - Re: [RFC] btf: Some structs are doubled because of struct ring

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Message-ID: <20191213121118.236f55b8@gandalf.local.home>
Date:   Fri, 13 Dec 2019 12:11:18 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Jiri Olsa <jolsa@...hat.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        Quentin Monnet <quentin.monnet@...ronome.com>
Subject: Re: [RFC] btf: Some structs are doubled because of struct
 ring_buffer

On Fri, 13 Dec 2019 08:51:57 -0800
Alexei Starovoitov <alexei.starovoitov@...il.com> wrote:

> It had two choices. Both valid. I don't know why gdb picked this one.
> So yeah I think renaming 'ring_buffer' either in ftrace or in perf would be
> good. I think renaming ftrace one would be better, since gdb picked perf one
> for whatever reason.

Because of the sort algorithm. But from a technical perspective, the
ring buffer that ftrace uses is generic, where the perf ring buffer can
only be used for perf. Call it "event_ring_buffer" or whatever, but
it's not generic and should not have a generic name.

-- Steve