Re: next-20250407: qemu_x86_64 clang-20, clang-nightly no console log but gcc-13 boot pass

[Naresh Kamboju]

On Mon, 7 Apr 2025 at 17:15, Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote:
>
> Regressions on qemu-x86_64 with clang-20 and clang-nightly on the
> Linux next-20250407 and no console output.
>
> The gcc-13 builds boot pass on qemu-x86_64.
>
> First seen on the next-20250407.
> Bad: next-20250407
> Good:next-20250404
>
> * qemu-x86_64, boot
>  - boot/clang-20-lkftconfig
>  - boot/clang-20-lkftconfig-compat
>  - boot/clang-nightly-lkftconfig
>
> Regression Analysis:
> - New regression? Yes
> - Reproducibility? Yes
>
> Boot regression: qemu_x86_64 clang-20, clang-nightly no console log
> Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

Anders bisected this and found,
# first bad commit:
   [cc34e658c6db493c1524077e95b42d478de58f2b]
   x86/boot: Move the early GDT/IDT setup code into startup/

Lore report link,
 - https://lore.kernel.org/all/CA+G9fYt4VVa3kUDR+ze05xM+fRmMBVfbBTsypUq5oOpAfuzjfg@xxxxxxxxxxxxxx/

- Naresh