linux-kernel - Re: ANNOUNCE: pahole v1.24 (Faster BTF encoding, 64-bit BTF enum entries)

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Date:   Sun, 28 Aug 2022 09:38:09 +0200
From:   Jiri Olsa <olsajiri@...il.com>
To:     Martin Reboredo <yakoyoku@...il.com>
Cc:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
        Luna Jernberg <droidbittin@...il.com>, dwarves@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alibek Omarov <a1ba.omarov@...il.com>,
        Kornilios Kourtis <kornilios@...valent.com>,
        Kui-Feng Lee <kuifeng@...com>, Yonghong Song <yhs@...com>,
        bpf@...r.kernel.org
Subject: Re: ANNOUNCE: pahole v1.24 (Faster BTF encoding, 64-bit BTF enum
 entries)

On Wed, Aug 24, 2022 at 07:50:39PM -0300, Martin Reboredo wrote:
> On 8/24/22 11:38, Luna Jernberg wrote:
> > https://forum.endeavouros.com/t/failed-to-start-load-kernel-modules-on-boot-after-system-update-nvidia/30584/17?u=sradjoker
> > 
> > On 8/24/22, Arnaldo Carvalho de Melo <arnaldo.melo@...il.com> wrote:
> >> Em Wed, Aug 24, 2022 at 04:36:18PM +0200, Luna Jernberg escreveu:

SNIP

> 
> Can you try a build of the kernel or the by passing the
> --skip_encoding_btf_enum64 to scripts/pahole-flags.sh?

Martin,
could you please send formal patch this?

thanks,
jirka

> 
> Here's a patch for either in tree scripts/pahole-flags.sh or
> /usr/lib/modules/5.19.3-arch1-1/build/scripts/pahole-flags.sh
> 
> diff --git a/scripts/pahole-flags.sh b/scripts/pahole-flags.sh
> index 0d99ef17e4a528..1f1f1d397c399a 100755
> --- a/scripts/pahole-flags.sh
> +++ b/scripts/pahole-flags.sh
> @@ -19,5 +19,9 @@ fi
>  if [ "${pahole_ver}" -ge "122" ]; then
>  	extra_paholeopt="${extra_paholeopt} -j"
>  fi
> +if [ "${pahole_ver}" -ge "124" ]; then
> +	# see PAHOLE_HAS_LANG_EXCLUDE
> +	extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_enum64"
> +fi
> 
>  echo ${extra_paholeopt}
> 
> - Martin Rodriguez Reboredo