On Fri, May 31, 2024 at 6:13 AM Maximilian Bosch <maximilian@xxxxxxxxx> wrote: > > From: "torvic9@xxxxxxxxxxx" <torvic9@xxxxxxxxxxx> > > Zstd offers a very fine-grained control of compression ratios. > Add a Kconfig option that allows setting the desired compression > level for module compression. > > Signed-off-by: Tor Vic <torvic9@xxxxxxxxxxx> > Tested-by: Piotr Gorski <lucjan.lucjanov@xxxxxxxxx> > Tested-by: Maximilian Bosch <maximilian@xxxxxxxxx> Please use: $ ZSTD_CLEVEL=N make modules_install I hope this is available widely enough. https://github.com/facebook/zstd/commit/6e9512a70cfe099ac6fdf4dda58b61c2e79bbfd9 > --- > kernel/module/Kconfig | 8 ++++++++ > scripts/Makefile.modinst | 2 +- > 2 files changed, 9 insertions(+), 1 deletion(-) > > diff --git a/kernel/module/Kconfig b/kernel/module/Kconfig > index 33a2e991f608..076b18dd3941 100644 > --- a/kernel/module/Kconfig > +++ b/kernel/module/Kconfig > @@ -317,6 +317,14 @@ config MODULE_COMPRESS_ZSTD > > endchoice > > +config MODULE_COMPRESS_ZSTD_LEVEL > + int "Compression level (1-19)" > + depends on MODULE_COMPRESS_ZSTD > + range 1 19 > + default 3 > + help > + Compression level used by zstd for compressing modules. > + > config MODULE_DECOMPRESS > bool "Support in-kernel module decompression" > depends on MODULE_COMPRESS_GZIP || MODULE_COMPRESS_XZ || MODULE_COMPRESS_ZSTD > diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst > index ab0c5bd1a60f..480d47eca36a 100644 > --- a/scripts/Makefile.modinst > +++ b/scripts/Makefile.modinst > @@ -101,7 +101,7 @@ quiet_cmd_gzip = GZIP $@ > quiet_cmd_xz = XZ $@ > cmd_xz = $(XZ) --lzma2=dict=2MiB -f $< > quiet_cmd_zstd = ZSTD $@ > - cmd_zstd = $(ZSTD) -T0 --rm -f -q $< > + cmd_zstd = $(ZSTD) -$(CONFIG_MODULE_COMPRESS_ZSTD_LEVEL) -T0 --rm -f -q $< > > $(dst)/%.ko.gz: $(dst)/%.ko FORCE > $(call cmd,gzip) > -- > 2.42.0 > > -- Best Regards Masahiro Yamada
