linux-kernel - Re: [PATCH v4 0/7] scripts/make_fit: Support ramdisks and faster operations

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Message-ID: <CAFLszTibSrTwhGaRZC5HF=UYnsdi8q0j9pyNbEL7jKSnYd6hBA@mail.gmail.com>
Date: Thu, 30 Oct 2025 18:48:34 +0100
From: Simon Glass <sjg@...omium.org>
To: linux-arm-kernel@...ts.infradead.org
Cc: Chen-Yu Tsai <wenst@...omium.org>, Ahmad Fatoum <a.fatoum@...gutronix.de>, 
	Masahiro Yamada <masahiroy@...nel.org>, J . Neuschäfer <j.ne@...teo.net>, 
	Nicolas Schier <nicolas@...sle.eu>, Tom Rini <trini@...sulko.com>, Ard Biesheuvel <ardb@...nel.org>, 
	Catalin Marinas <catalin.marinas@....com>, David Sterba <dsterba@...e.com>, 
	Josh Poimboeuf <jpoimboe@...nel.org>, Kees Cook <kees@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Nick Terrell <terrelln@...com>, 
	Nicolas Schier <nicolas.schier@...ux.dev>, Rong Xu <xur@...gle.com>, Will Deacon <will@...nel.org>, 
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/7] scripts/make_fit: Support ramdisks and faster operations

Hi,

On Tue, 7 Oct 2025 at 01:02, Simon Glass <sjg@...omium.org> wrote:
>
> This series updates 'make image.fit' to support adding a ramdisk to the
> FIT, either one provided as a parameter or one created from all the
> kernel modules.
>
> It also includes a few performance improvement, so that building a FIT
> from ~450MB of kernel/module/devicetree files only takes a few seconds
> on a modern machine.
>
> Changes in v4:
> - Provide the list of modules from the Makefile
> - Reduce verbosity (don't print every module filename)
> - Rename the Makefile variable from 'EXTRA' to 'MAKE_FIT_FLAGS'
> - Use an empty FIT_MODULES to disable the feature, instead of '0'
> - Make use of the 'modules' dependency to ensure modules are built
> - Pass the list of modules to the script
>
> Changes in v3:
> - Move the ramdisk chunk into the correct patch
> - Add a comment at the top of the file about the -r option
> - Count the ramdisk in the total files
> - Update the commit message
> - Update the commit message
> - Add a way to add built modules into the FIT
>
> Changes in v2:
> - Don't compress the ramdisk as it is already compressed
>
> Simon Glass (7):
>   scripts/make_fit: Speed up operation
>   scripts/make_fit: Support an initial ramdisk
>   scripts/make_fit: Move dtb processing into a function
>   scripts/make_fit: Provide a way to add built modules
>   kbuild: Allow adding modules into the FIT ramdisk
>   scripts/make_fit: Support a few more parallel compressors
>   scripts/make_fit: Compress dtbs in parallel
>
>  arch/arm64/boot/Makefile |   4 +
>  scripts/Makefile.lib     |  10 +-
>  scripts/make_fit.py      | 264 +++++++++++++++++++++++++++++++++------
>  3 files changed, 239 insertions(+), 39 deletions(-)
>

Are there any comments on this series?

> --
> 2.43.0
>
> base-commit: 4a71531471926e3c391665ee9c42f4e0295a4585
> branch: fita4

Regards,
Simon