From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: "Hao Luo" <haoluo@google.com>,
"Jiri Slaby" <jirislaby@kernel.org>,
"Érico Rolim" <erico.erc@gmail.com>,
dwarves@vger.kernel.org,
"open list" <linux-kernel@vger.kernel.org>,
"Arnaldo Carvalho de Melo" <acme@redhat.com>,
"Andrii Nakryiko" <andriin@fb.com>,
"Alexei Starovoitov" <alexei.starovoitov@gmail.com>,
bpf <bpf@vger.kernel.org>
Subject: Re: Segfault in pahole 1.18 when building kernel 5.9.1 for arm64
Date: Tue, 20 Oct 2020 15:14:58 -0300 [thread overview]
Message-ID: <20201020181458.GA2342001@kernel.org> (raw)
In-Reply-To: <CAEf4BzYDvvthK_S7EecsTO3HAVXiAf6AqHaiEWbf9+K7sjMiLA@mail.gmail.com>
Em Tue, Oct 20, 2020 at 10:10:19AM -0700, Andrii Nakryiko escreveu:
> On Tue, Oct 20, 2020 at 10:05 AM Hao Luo <haoluo@google.com> wrote:
> > Thanks for reporting this and cc'ing me. I forgot to update the error
> > messages when renaming the flags. I will send a patch to fix the error
> > message.
> > The commit
> > commit f3d9054ba8ff1df0fc44e507e3a01c0964cabd42
> > Author: Hao Luo <haoluo@google.com>
> > AuthorDate: Wed Jul 8 13:44:10 2020 -0700
> > btf_encoder: Teach pahole to store percpu variables in vmlinux BTF.
> > encodes kernel global variables into BTF so that bpf programs can
> > directly access them. If there is no need to access kernel global
> > variables, it's perfectly fine to use '--btf_encode_force' to skip
> > encoding bad symbols into BTF, or '--skip_encoding_btf_vars' to skip
> > encoding all global vars all together. I will add these info into the
> > updated error message.
> > Also cc bpf folks for attention of this bug.
> I've already fixed the message as part of
> 2e719cca6672 ("btf_encoder: revamp how per-CPU variables are encoded")
> It's currently still in the tmp.libbtf_encoder branch in pahole repo.
I'm now running:
$ grep BTF=y ../build/s390x-v5.9.0+/.config
CONFIG_DEBUG_INFO_BTF=y
$ make -j24 CROSS_COMPILE=s390x-linux-gnu- ARCH=s390 O=../build/s390x-v5.9.0+/
To do the last test I wanted before moving it to master.
- Arnaldo
next prev parent reply other threads:[~2020-10-20 18:15 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-18 23:18 Segfault in pahole 1.18 when building kernel 5.9.1 for arm64 Érico Rolim
2020-10-20 9:01 ` Jiri Slaby
2020-10-20 12:20 ` Arnaldo Carvalho de Melo
2020-10-20 17:04 ` Hao Luo
2020-10-20 17:10 ` Andrii Nakryiko
2020-10-20 17:18 ` Hao Luo
2020-10-20 18:14 ` Arnaldo Carvalho de Melo [this message]
2020-10-20 19:02 ` Arnaldo Carvalho de Melo
2020-10-21 6:22 ` Jiri Slaby
2020-10-21 11:29 ` Arnaldo Carvalho de Melo
2020-10-21 15:53 ` Andrii Nakryiko
2020-10-21 16:26 ` Arnaldo Carvalho de Melo
2020-10-20 17:15 ` Andrii Nakryiko
2020-10-21 5:52 ` Jiri Slaby
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