Re: Broken Kconfig scripts in v6.11: conf/mconf stuck in endless loop at 100% CPU
From: Masahiro Yamada
Date: Wed Sep 25 2024 - 07:27:51 EST
On Wed, Sep 25, 2024 at 9:28 AM Marco Bonelli <marco@xxxxxxxxxx> wrote:
>
> I was building v6.11 for PowerPC when I noticed that `make olddefconfig` hangs
> indefinitely when running `scripts/kconfig/conf` and gets stuck in what seems
> an infinite loop at 100% CPU while evaluating an expression.
>
> The issue is still present on master of linux-next. I did a bisect run and
> narrowed it down to this commit:
>
> f79dc03fe68c79d388908182e68d702f7f1786bc kconfig: refactor choice value calculation
>
> Steps to reproduce:
>
> git checkout v6.11
> export ARCH=powerpc CROSS_COMPILE=powerpc-linux-
> make distclean
> make ppc64_defconfig
> ./scripts/config --file .config -d PPC64
> make olddefconfig
> # Hangs indefinitely running scripts/kconfig/conf
>
>
> Let me know if any additional information is needed. Happy to help.
This provides enough information to figure out the issue.
I posted a patch.
Thanks.
--
Best Regards
Masahiro Yamada