linux-kernel - Re: [PATCH v5 0/3] Kbuild: DWARF v5 support

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Message-ID: <CAKwvOd=5iR0JONwDb6ypD7dzzjOS3Uj0CjcyYqPF48eK4Pi90Q@mail.gmail.com>
Date:   Fri, 15 Jan 2021 15:34:33 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Sedat Dilek <sedat.dilek@...il.com>, Yonghong Song <yhs@...com>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Clang-Built-Linux ML <clang-built-linux@...glegroups.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Jakub Jelinek <jakub@...hat.com>,
        Fangrui Song <maskray@...gle.com>,
        Caroline Tice <cmtice@...gle.com>,
        Nick Clifton <nickc@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: Re: [PATCH v5 0/3] Kbuild: DWARF v5 support

On Fri, Jan 15, 2021 at 3:24 PM Yonghong Song <yhs@...com> wrote:
>
>
>
> On 1/15/21 1:53 PM, Sedat Dilek wrote:
> > En plus, I encountered breakage with GCC v10.2.1 and LLVM=1 and
> > CONFIG_DEBUG_INFO_DWARF4.
> > So might be good to add a "depends on !DEBUG_INFO_BTF" in this combination.

Can you privately send me your configs that repro? Maybe I can isolate
it to a set of configs?

>
> I suggested not to add !DEBUG_INFO_BTF to CONFIG_DEBUG_INFO_DWARF4.
> It is not there before and adding this may suddenly break some users.
>
> If certain combination of gcc/llvm does not work for
> CONFIG_DEBUG_INFO_DWARF4 with pahole, this is a bug bpf community
> should fix.

Is there a place I should report bugs?

>
> >
> > I had some other small nits commented in the single patches.
> >
> > As requested in your previous patch-series, feel free to add my:
> >
> > Tested-by: Sedat Dilek <sedat.dilek@...il.com>

Yeah, I'll keep it if v6 is just commit message changes.

-- 
Thanks,
~Nick Desaulniers