From: Jiri Olsa <olsajiri@gmail.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: Jiri Olsa <olsajiri@gmail.com>,
Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>, Hao Luo <haoluo@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
bpf@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-perf-users@vger.kernel.org, Martin KaFai Lau <kafai@fb.com>,
Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>,
Stanislav Fomichev <sdf@google.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Namhyung Kim <namhyung@gmail.com>,
Dave Chinner <david@fromorbit.com>
Subject: Re: [PATCHv3 bpf-next 0/9] mm/bpf/perf: Store build id in file object
Date: Sat, 18 Mar 2023 18:40:45 +0100 [thread overview]
Message-ID: <ZBX3nRWtc6+EI13W@krava> (raw)
In-Reply-To: <ZBXV3crf/wX5D9lo@casper.infradead.org>
On Sat, Mar 18, 2023 at 03:16:45PM +0000, Matthew Wilcox wrote:
> On Sat, Mar 18, 2023 at 09:33:49AM +0100, Jiri Olsa wrote:
> > On Thu, Mar 16, 2023 at 05:34:41PM +0000, Matthew Wilcox wrote:
> > > 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?
> >
> > I hope so, but I guess only time tell.. given the response by Ian and Andrii
> > there are 3 big users already
>
> So the whole "There's a config option to turn it off" shtick is just a
> fig-leaf. I won't ever see it turned off. You're imposing the cost of
> this on EVERYONE who runs a distro kernel. And almost nobody will see
> any benefits from it. Thanks for admitting that.
>
sure, I understand that's legit way of looking at this
I can imagine distros would have that enabled for debugging version of
the kernel (like in fedora), and if that proves to be useful the standard
kernel might take it, but yes, there's price (for discussion as pointed
by Andrii) and it'd be for the distro maintainers to decide
jirka
next prev parent reply other threads:[~2023-03-18 17:41 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-16 17:01 [PATCHv3 bpf-next 0/9] mm/bpf/perf: Store build id in file object Jiri Olsa
2023-03-16 17:01 ` [PATCHv3 bpf-next 1/9] mm: " Jiri Olsa
2023-03-16 22:07 ` Andrii Nakryiko
2023-03-16 17:01 ` [PATCHv3 bpf-next 2/9] perf: Use file object build id in perf_event_mmap_event Jiri Olsa
2023-03-16 17:01 ` [PATCHv3 bpf-next 3/9] bpf: Use file object build id in stackmap Jiri Olsa
2023-03-16 22:07 ` Andrii Nakryiko
2023-03-16 17:01 ` [PATCHv3 bpf-next 4/9] bpf: Switch BUILD_ID_SIZE_MAX to enum Jiri Olsa
2023-03-16 22:07 ` Andrii Nakryiko
2023-03-16 17:01 ` [PATCHv3 bpf-next 5/9] selftests/bpf: Add read_buildid function Jiri Olsa
2023-03-16 22:23 ` Andrii Nakryiko
2023-03-30 22:05 ` Jiri Olsa
2023-03-16 17:01 ` [PATCHv3 bpf-next 6/9] selftests/bpf: Add err.h header Jiri Olsa
2023-03-16 22:24 ` Andrii Nakryiko
2023-03-16 17:01 ` [PATCHv3 bpf-next 7/9] selftests/bpf: Replace extract_build_id with read_build_id Jiri Olsa
2023-03-16 17:01 ` [PATCHv3 bpf-next 8/9] selftests/bpf: Add iter_task_vma_buildid test Jiri Olsa
2023-03-16 22:31 ` Andrii Nakryiko
2023-03-16 17:01 ` [PATCHv3 bpf-next 9/9] selftests/bpf: Add file_build_id test Jiri Olsa
2023-03-16 19:59 ` Daniel Borkmann
2023-03-16 22:36 ` Andrii Nakryiko
2023-03-16 17:34 ` [PATCHv3 bpf-next 0/9] mm/bpf/perf: Store build id in file object Matthew Wilcox
2023-03-16 17:50 ` Ian Rogers
2023-03-16 21:51 ` Andrii Nakryiko
2023-03-17 3:51 ` Matthew Wilcox
2023-03-17 16:33 ` Andrii Nakryiko
2023-03-17 21:14 ` Al Viro
2023-03-17 21:21 ` Al Viro
2023-03-18 6:08 ` Andrii Nakryiko
2023-03-18 8:34 ` Jiri Olsa
2023-03-18 8:33 ` Jiri Olsa
2023-03-18 15:16 ` Matthew Wilcox
2023-03-18 17:40 ` Jiri Olsa [this message]
2023-03-22 15:45 ` Arnaldo Carvalho de Melo
2023-03-31 18:19 ` Andrii Nakryiko
2023-03-31 18:36 ` Matthew Wilcox
2023-03-31 20:27 ` Andrii Nakryiko
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