| Message ID | 20230203-arm64-defconfigs-v1-0-cd0694a05f13@kernel.org (mailing list archive) |
|---|---|
| Headers | show |
| Series | arm64: configs: Provide slimmed down configuration for guests | expand |
On Fri, Feb 10, 2023 at 07:52:46PM +0000, Mark Brown wrote: > It has been noted that due to the extensive platform support it > enables the arm64 defconfig is rather large and takes a while to > build in comparison with other architectures which can be a > burden when doing cross architecture work, especially when > testing is mainly in emulation. We can mitigate this by providing > a configuration that only enables the support required to run in > mach-virt, this will be much smaller and quicker to build. Sorry, this is v2 of https://lore.kernel.org/linux-arm-kernel/20230203-arm64-defconfigs-v1-0-6d0d03a6dbd2@kernel.org/#r but it seems b4 didn't pick up that it was v2 (I think due to me messing up moving between machines).
Hello: This series was applied to soc/soc.git (for-next) by Arnd Bergmann <arnd@arndb.de>: On Fri, 10 Feb 2023 19:52:46 +0000 you wrote: > It has been noted that due to the extensive platform support it > enables the arm64 defconfig is rather large and takes a while to > build in comparison with other architectures which can be a > burden when doing cross architecture work, especially when > testing is mainly in emulation. We can mitigate this by providing > a configuration that only enables the support required to run in > mach-virt, this will be much smaller and quicker to build. > > [...] Here is the summary with links: - [1/3] scripts: merge_config: Add option to suppress warning on overrides https://git.kernel.org/soc/soc/c/46dff8d7e381 - [2/3] kbuild: Provide a version of merge_into_defconfig without override warnings https://git.kernel.org/soc/soc/c/a63971257e66 - [3/3] arm64: configs: Add virtconfig https://git.kernel.org/soc/soc/c/c6cd63f5af39 You are awesome, thank you!
It has been noted that due to the extensive platform support it enables the arm64 defconfig is rather large and takes a while to build in comparison with other architectures which can be a burden when doing cross architecture work, especially when testing is mainly in emulation. We can mitigate this by providing a configuration that only enables the support required to run in mach-virt, this will be much smaller and quicker to build. Having two completely separate configurations would mean that we'd need to make any changes to the architecture wide configuration in both the existing defconfig and the new configuration if we wanted to ensure consistent default behaviour. Instead define a new config fragement which turns off options from defconfig which enable platform support, currently this just covers the ARCH_ options that control SoC specific drivers as validation for this approach - if people are happy with this approach we can build on it to further reduce the size of the new configuration. The resulting configuration builds about 25% faster for me. v2: - Rework to base on turning off options from defconfig rather than splitting out a base configuration and then adding things to it. Signed-off-by: Mark Brown <broonie@kernel.org> --- Mark Brown (3): scripts: merge_config: Add option to suppress warning on overrides kbuild: Provide a version of merge_into_defconfig without override warnings arm64: configs: Add virtconfig arch/arm64/Makefile | 6 ++++++ arch/arm64/configs/virt.config | 39 +++++++++++++++++++++++++++++++++++++++ scripts/Makefile.defconf | 14 ++++++++++++++ scripts/kconfig/merge_config.sh | 25 ++++++++++++++++--------- 4 files changed, 75 insertions(+), 9 deletions(-) --- base-commit: 4fafd96910add124586b549ad005dcd179de8a18 change-id: 20230203-arm64-defconfigs-c04cf5fa6288 Best regards,