Messages in this thread Patch in this message | | | From | Masahiro Yamada <> | Subject | [PATCH 5/5] kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols | Date | Mon, 26 Sep 2022 18:02:29 +0900 |
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Every EXPORT_SYMBOL creates __kstrtab_* and __kstrtabns_*, which consumes 15-20% of the kallsyms entries.
For x86_64 defconfig,
$ cat /proc/kallsyms | wc 129527 388581 5685465 $ cat /proc/kallsyms | grep __kstrtab | wc 23489 70467 1187932
We already ignore __crc_* symbols populated by EXPORT_SYMBOL, so it should be fine to ignore __kstrtab_* and __kstrtabns_* as well.
This makes vmlinux a bit smaller.
$ size vmlinux.before vmlinux.after text data bss dec hex filename 22785374 8559694 1413328 32758396 1f3da7c vmlinux.before 22785374 8137806 1413328 32336508 1ed6a7c vmlinux.after
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> ---
scripts/mksysmap | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/scripts/mksysmap b/scripts/mksysmap index 75f3dfd1c156..16a08b8ef2f8 100755 --- a/scripts/mksysmap +++ b/scripts/mksysmap @@ -43,6 +43,8 @@ # $ - local symbols for ARM, MIPS, etc. # .L - local labels, .LBB,.Ltmpxxx,.L__unnamed_xx,.LASANPC, etc. # __crc_ - modversions +# __kstrtab_ - EXPORT_SYMBOL (symbol name) +# __kstrtabns_ - EXPORT_SYMBOL (namespace) # # Ignored symbols: # L0 - for LoongArch? @@ -52,5 +54,7 @@ $NM -n $1 | grep -v \ -e ' \$' \ -e ' \.L' \ -e ' __crc_' \ + -e ' __kstrtab_' \ + -e ' __kstrtabns_' \ -e ' L0$' \ > $2 -- 2.34.1
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