linux-kernel - Re: [PATCHv3 bpf-next 0/9] mm/bpf/perf: Store build id in file object

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Date:   Thu, 16 Mar 2023 17:34:41 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Hao Luo <haoluo@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        bpf@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-perf-users@...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>,
        Stanislav Fomichev <sdf@...gle.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Namhyung Kim <namhyung@...il.com>,
        Dave Chinner <david@...morbit.com>
Subject: Re: [PATCHv3 bpf-next 0/9] mm/bpf/perf: Store build id in file object

On Thu, Mar 16, 2023 at 06:01:40PM +0100, Jiri Olsa wrote:
> hi,
> this patchset adds build id object pointer to struct file object.
> 
> We have several use cases for build id to be used in BPF programs
> [2][3].

Yes, you have use cases, but you never answered the question I asked:

Is this going to be enabled by every distro kernel, or is it for special
use-cases where only people doing a very specialised thing who are
willing to build their own kernels will use it?

Saying "hubble/tetragon" doesn't answer that question.  Maybe it does
to you, but I have no idea what that software is.

Put it another way: how does this make *MY* life better?  Literally me.
How will it affect my life?