From: Piotr Gorski <lucjan.lucjanov@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org,
Michal Marek <michal.lkml@markovi.net>,
Masahiro Yamada <masahiroy@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Piotr Gorski <lucjan.lucjanov@gmail.com>
Subject: [PATCH] kbuild: use smaller dictionary size for zstd module compression
Date: Fri, 10 Sep 2021 15:09:54 +0200 [thread overview]
Message-ID: <20210910130954.1392104-1-lucjan.lucjanov@gmail.com> (raw)
By default, zstd without parameters uses a dictionary size of 8 MB.
However, most modules are much smaller than that.
Use a dictionary size of 2 MB for module compression, resulting in
slightly higher compression speed while still maintaining a good
compression ratio.
The --zstd=wlog=21 option is equivalent to --lzma2=dict=2MiB used in XZ compression.
Signed-off-by: Piotr Gorski <lucjan.lucjanov@gmail.com>
---
scripts/Makefile.modinst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst
index ff9b09e4cfca..c3475e5aca7c 100644
--- a/scripts/Makefile.modinst
+++ b/scripts/Makefile.modinst
@@ -97,7 +97,7 @@ 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) --zstd=wlog=21 -T0 --rm -f -q $<
$(dst)/%.ko.gz: $(dst)/%.ko FORCE
$(call cmd,gzip)
--
2.33.0.142.ge0a2f5cbc5
next reply other threads:[~2021-09-10 13:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-10 13:09 Piotr Gorski [this message]
2021-09-17 15:07 ` [PATCH] kbuild: use smaller dictionary size for zstd module compression Piotr Górski
2021-09-19 11:36 ` Masahiro Yamada
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