From 21a899f9fc78be6b289ee4627bccadf560930eb5 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Thomas=20Wei=C3=9Fschuh?= Date: Tue, 27 Dec 2022 16:01:02 +0000 Subject: [PATCH] objtool: Optimize layout of struct symbol MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Reduce the size of struct symbol on x86_64 from 208 to 200 bytes. This structure is allocated a lot and never freed. This reduces maximum memory usage while processing vmlinux.o from 2919716 KB to 2917988 KB (-0.5%) on my notebooks "localmodconfig". Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/r/20221216-objtool-memory-v2-6-17968f85a464@weissschuh.net Signed-off-by: Josh Poimboeuf --- tools/objtool/include/objtool/elf.h | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/tools/objtool/include/objtool/elf.h b/tools/objtool/include/objtool/elf.h index 1c90f0ac0d531..ad0024da262b0 100644 --- a/tools/objtool/include/objtool/elf.h +++ b/tools/objtool/include/objtool/elf.h @@ -50,12 +50,11 @@ struct symbol { GElf_Sym sym; struct section *sec; char *name; - unsigned int idx; - unsigned char bind, type; + unsigned int idx, len; unsigned long offset; - unsigned int len; unsigned long __subtree_last; struct symbol *pfunc, *cfunc, *alias; + unsigned char bind, type; u8 uaccess_safe : 1; u8 static_call_tramp : 1; u8 retpoline_thunk : 1; -- 2.30.2