From: "Arnd Bergmann" <arnd@arndb.de>
To: "Kees Cook" <kees@kernel.org>, "Lorenzo Stoakes" <ljs@kernel.org>
Cc: "Linus Torvalds" <torvalds@linux-foundation.org>,
"Nathan Chancellor" <nathan@kernel.org>,
"Nicolas Schier" <nsc@kernel.org>,
"Nick Desaulniers" <ndesaulniers@google.com>,
"Bill Wendling" <morbo@google.com>,
"Justin Stitt" <justinstitt@google.com>,
"Masahiro Yamada" <masahiroy@kernel.org>,
"Alexey Gladkov" <legion@kernel.org>,
"Thomas Gleixner" <tglx@kernel.org>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Paul Walmsley" <pjw@kernel.org>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Alexandre Ghiti" <alex@ghiti.fr>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Ard Biesheuvel" <ardb@kernel.org>,
"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
"Josh Poimboeuf" <jpoimboe@kernel.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Boqun Feng" <boqun@kernel.org>, "Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <lossin@kernel.org>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Alice Ryhl" <aliceryhl@google.com>,
"Trevor Gross" <tmgross@umich.edu>,
"Danilo Krummrich" <dakr@kernel.org>,
"Daniel Almeida" <daniel.almeida@collabora.com>,
"Tamir Duberstein" <tamird@kernel.org>,
"Alexandre Courbot" <acourbot@nvidia.com>,
"Onur Özkan" <work@onurozkan.dev>,
"Jonathan Corbet" <corbet@lwn.net>,
"Randy Dunlap" <rdunlap@infradead.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
llvm@lists.linux.dev, linux-riscv@lists.infradead.org,
Linux-Arch <linux-arch@vger.kernel.org>,
linux-arm-kernel@lists.infradead.org, linux-efi@vger.kernel.org,
rust-for-linux@vger.kernel.org, linux-doc@vger.kernel.org,
"Jens Axboe" <axboe@kernel.dk>,
linux-hardening@vger.kernel.org
Subject: Re: [PATCH v2 21/21] kbuild: use pigz for gzip compression if available
Date: Wed, 16 Sep 2026 08:38:33 +0200 [thread overview]
Message-ID: <081b2b60-e295-4cd7-b201-d996a88c5f28@app.fastmail.com> (raw)
In-Reply-To: <202609151758.BA5732348@keescook>
On Wed, Sep 16, 2026, at 03:06, Kees Cook wrote:
> On Mon, Sep 14, 2026 at 10:22:20AM +0100, Lorenzo Stoakes (ARM) wrote:
>
> Makefile:
>
> KPGZIP := $(if $(shell command -v pigz 2>/dev/null),$(PYTHON3)
> $(abs_srctree)/scripts/jobserver-exec
> $(abs_srctree)/scripts/parallel-gzip,gzip)
>
> and the same scripts/parallel-gzip:
>
> #!/bin/sh
> exec pigz -p ${PARALLELISM:-1} "$@"
>
> And then replace the /boot/ KGZIP uses with KPGZIP. Then we don't need
> to change modules, config_data, new users, nor cmd_gzip, etc, which all
> continue to use the regular KGZIP and the "use python" part for the
> KPGZIP case becomes is a 1-time cost?
Nice, I like the idea and this this will work. I didn't know about
scripts/jobserver-exec, but this does seem like a perfect fit.
I checked the other compression tools we support, and found that
zstd is another one that has built-in support for parallel
compression, so we probably want to have it there as well.
Arnd
next prev parent reply other threads:[~2026-09-16 6:38 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-14 9:21 [PATCH v2 00/21] kbuild: significantly speed up kernel builds Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 01/21] kbuild: do not allocate .modinfo in vmlinux Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 02/21] kallsyms: index symbols by token to speed up table compression Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 03/21] kallsyms: output binary data to speed output and kallsyms assembly Lorenzo Stoakes (ARM)
2026-09-14 20:16 ` Markus Elfring
2026-09-14 21:44 ` David Laight
2026-09-15 7:10 ` [v2 " Markus Elfring
2026-09-14 9:22 ` [PATCH v2 04/21] kbuild: do not sort nm output where the order is irrelevant Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 05/21] kbuild: only emit vmlinux relocations when required Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 06/21] elf-parse: add section flags, symbol binding and a read-only mapping Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 07/21] kallsyms: reimplement mksysmap in C Lorenzo Stoakes (ARM)
2026-09-14 16:33 ` Markus Elfring
2026-09-14 16:54 ` Markus Elfring
2026-09-14 17:01 ` Markus Elfring
2026-09-14 9:22 ` [PATCH v2 08/21] kbuild: cache list, composite object state per object Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 09/21] kbuild: implement and use depcheck to check dependency timestamps Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 10/21] kbuild: move the toolchain checks into init/Kconfig.toolchain Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 11/21] kbuild: avoid re-running compiler and linker probes Lorenzo Stoakes (ARM)
2026-09-14 15:02 ` John Stoffel
2026-09-14 15:24 ` Lorenzo Stoakes (ARM)
2026-09-15 11:01 ` Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 12/21] modpost: cache section relocation mismatch state Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 13/21] modpost: emit module descriptors as assembly Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 14/21] kbuild: batch module finalisation Lorenzo Stoakes (ARM)
2026-09-14 18:00 ` Kees Cook
2026-09-15 10:44 ` Lorenzo Stoakes (ARM)
2026-09-15 16:49 ` Kees Cook
2026-09-15 17:54 ` Lorenzo Stoakes (ARM)
2026-09-15 17:56 ` Nick Desaulniers
2026-09-14 9:22 ` [PATCH v2 15/21] objtool: cache relocations, do less work Lorenzo Stoakes (ARM)
2026-09-14 19:44 ` Josh Poimboeuf
2026-09-14 20:06 ` Linus Torvalds
2026-09-14 22:23 ` Josh Poimboeuf
2026-09-14 22:30 ` Linus Torvalds
2026-09-15 12:24 ` Lorenzo Stoakes (ARM)
2026-09-15 12:19 ` Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 16/21] objtool: size the instruction hash to the text Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 17/21] objtool: decode instructions and resolve branch targets in parallel Lorenzo Stoakes (ARM)
2026-09-14 18:20 ` Kees Cook
2026-09-15 10:09 ` Lorenzo Stoakes (ARM)
2026-09-15 11:29 ` David Laight
2026-09-15 15:04 ` Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 18/21] kbuild: rust: optionally parallelise rustc front end Lorenzo Stoakes (ARM)
2026-09-14 18:32 ` Kees Cook
2026-09-15 11:09 ` Lorenzo Stoakes (ARM)
2026-09-15 11:16 ` Lorenzo Stoakes (ARM)
2026-09-15 6:32 ` Miguel Ojeda
2026-09-15 11:15 ` Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 19/21] rust: make exports.o depend on the headers generated for it Lorenzo Stoakes (ARM)
2026-09-14 9:22 ` [PATCH v2 20/21] kbuild: build rust crates in parallel with the rest of the build Lorenzo Stoakes (ARM)
2026-09-14 18:37 ` Kees Cook
2026-09-15 11:58 ` Lorenzo Stoakes (ARM)
2026-09-15 16:52 ` Kees Cook
2026-09-16 7:42 ` Gary Guo
2026-09-14 9:22 ` [PATCH v2 21/21] kbuild: use pigz for gzip compression if available Lorenzo Stoakes (ARM)
2026-09-14 16:39 ` Kees Cook
2026-09-14 16:49 ` H. Peter Anvin
2026-09-14 17:50 ` Kees Cook
2026-09-15 14:30 ` Lorenzo Stoakes (ARM)
2026-09-15 17:31 ` Kees Cook
2026-09-15 17:47 ` Nick Desaulniers
2026-09-15 18:02 ` Arnd Bergmann
2026-09-16 1:06 ` Kees Cook
2026-09-16 6:38 ` Arnd Bergmann [this message]
2026-09-14 15:41 ` [PATCH v2 00/21] kbuild: significantly speed up kernel builds Kees Cook
2026-09-14 15:53 ` Linus Torvalds
2026-09-15 8:53 ` Arnd Bergmann
2026-09-15 11:35 ` Lorenzo Stoakes (ARM)
2026-09-14 18:25 ` Lorenzo Stoakes (ARM)
2026-09-14 18:43 ` Kees Cook
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