From: Arnaldo <arnaldo.melo@gmail.com>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>,
dwarves@vger.kernel.org, bpf <bpf@vger.kernel.org>,
Kernel Team <kernel-team@fb.com>, Jiri Olsa <jolsa@kernel.org>,
Namhyung Kim <namhyung@kernel.org>
Subject: Re: [PATCH dwarves 4/4] btf: add support for split BTF loading and encoding
Date: Wed, 11 Nov 2020 15:32:43 -0300 [thread overview]
Message-ID: <CD0AB08B-9BEC-4E72-AB16-2959F8837DCB@gmail.com> (raw)
In-Reply-To: <CAEf4BzajM3Pg13uTF7cKOWfASvhOPOx85ufcchuDcGLEq8d9fQ@mail.gmail.com>
On November 11, 2020 3:29:32 PM GMT-03:00, Andrii Nakryiko <andrii.nakryiko@gmail.com> wrote:
>On Wed, Nov 11, 2020 at 4:19 AM Arnaldo Carvalho de Melo
><acme@kernel.org> wrote:
>>
>> Em Wed, Nov 11, 2020 at 08:56:27AM -0300, Arnaldo Carvalho de Melo
>escreveu:
>> >
>> > The entry for btf_encode/-J is missing, I'll add in a followup
>patch.
>> >
>> > Also I had to fixup ARGP_btf_base to 321 as I added this, to
>simplify
>> > the kernel scripts and Makefiles:
>> >
>> > $ pahole --numeric_version
>> > 118
>> > $
>>
>> Added this:
>>
>> [acme@five pahole]$ git diff
>> diff --git a/man-pages/pahole.1 b/man-pages/pahole.1
>> index 20ee91fc911d4b39..f44c649924383a32 100644
>> --- a/man-pages/pahole.1
>> +++ b/man-pages/pahole.1
>> @@ -181,6 +181,14 @@ the debugging information.
>> .B \-\-skip_encoding_btf_vars
>> Do not encode VARs in BTF.
>>
>> +.TP
>> +.B \-J, \-\-btf_encode
>> +Encode BTF information from DWARF, used in the Linux kernel build
>process when
>> +CONFIG_DEBUG_INFO_BTF=y is present, introduced in Linux v5.2. Used
>to implement
>> +features such as BPF CO-RE (Compile Once - Run Everywhere).
>> +
>> +See \fIhttp://vger.kernel.org/bpfconf2019_talks/bpf-core.pdf\fR.
>
>Can you please point to [0] instead? That linked
Sure.
> presentation is
>already a bit out of date and will bitrot much faster. Blog post has
>at least a chance at being updated with relevant important stuff. Plus
>it has links both to the bpfconf2019 presentation, as well as some
>other resources (including your presentation).
>
> [0] https://nakryiko.com/posts/bpf-portability-and-co-re/
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
next prev parent reply other threads:[~2020-11-11 18:33 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-06 5:25 [PATCH dwarves 0/4] Add split BTF support to pahole Andrii Nakryiko
2020-11-06 5:25 ` [PATCH dwarves 1/4] btf_encoder: fix array index type numbering Andrii Nakryiko
2020-11-06 5:25 ` [PATCH dwarves 2/4] libbtf: improve variable naming and error reporting when writing out BTF Andrii Nakryiko
2020-11-06 5:25 ` [PATCH dwarves 3/4] libbpf: update libbpf submodlue reference to latest master Andrii Nakryiko
2020-11-06 5:25 ` [PATCH dwarves 4/4] btf: add support for split BTF loading and encoding Andrii Nakryiko
2020-11-11 11:56 ` Arnaldo Carvalho de Melo
2020-11-11 12:19 ` Arnaldo Carvalho de Melo
2020-11-11 18:29 ` Andrii Nakryiko
2020-11-11 18:32 ` Arnaldo [this message]
2020-11-13 11:35 ` Arnaldo Carvalho de Melo
2020-11-11 18:27 ` Andrii Nakryiko
2020-11-11 18:34 ` Arnaldo
2020-11-11 18:50 ` Andrii Nakryiko
2020-11-10 23:34 ` [PATCH dwarves 0/4] Add split BTF support to pahole Andrii Nakryiko
2020-11-11 0:29 ` Arnaldo
2020-11-11 0:35 ` Andrii Nakryiko
2020-11-11 0:38 ` Arnaldo
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