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

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Message-ID: <YwufePAAfJESjOyi@krava>
Date:   Sun, 28 Aug 2022 19:01:44 +0200
From:   Jiri Olsa <olsajiri@...il.com>
To:     Martin Rodriguez Reboredo <yakoyoku@...il.com>
Cc:     Jiri Olsa <olsajiri@...il.com>,
        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 Sun, Aug 28, 2022 at 11:29:35AM -0300, Martin Rodriguez Reboredo wrote:
> On 8/28/22 04:38, Jiri Olsa wrote:
> > 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
> 
> Sure, sure! Though it might take a bit of time due to being my first
> contribution submitted by me (I've already contributed through the Rust
> patches though), I'll add Kconfig entries for this, one for the
> availability to skip the enum64 encoding and another for toggle the
> flag. Stay tuned.

hm, but we actually need that just for 5.15 or whatever stable version
is using latest pahole but does not have support for enum64

please check Documentation/process/stable-kernel-rules.rst

jirka