Re: [PATCH v1 1/2] kbuild: Mark the kernel image gzip recipes as recursive

[Kees Cook]

On Fri, Oct 09, 2026 at 09:27:57PM -0700, Paul E. McKenney wrote:
> 			foreground	background
> 			-next	Fix	-next	Fix
>
> 	make -jN	Bug	Good	Bug	Good
>
> 	kvm.sh [1]	Bug	Bug	Bug	Bug
>
> [1] tools/testing/selftests/rcutorture/bin/kvm.sh --build-only --allcpus --configs TREE02 --trust-make

Thanks for the details! IIUC, the difference is the config, not
foreground vs background. kvm-build.sh adds CONFIG_INITRAMFS_SOURCE,
which is compressed with gzip by default. The usr/Makefile target picks
that compressor through a variable, so v1 missed it. Your plain "make
-jN" builds probably had no built-in initramfs, so the kernel image was
the only place where pigz ran, which v1 did cover.

Hopefully v2 has all the missed targets fixed now:
https://lore.kernel.org/lkml/20261010081910.stay.092-kees@xxxxxxxxxx/T/#m3b466b33f835119bfbd0c1b3c48d2a8a87f31691

-Kees

-- 
Kees Cook