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rodata: optimize memory usage of rodata section [3/5]

Browse Source 
PD#SWPL-31258

Problem:
Kernel RO data is too large, about 4.5mb on 32bit and 5.9mb on
64bit kernel

Solution:
1, remove CONFIG_KALLSYMS_ALL in module.c, which can help to save
about 200KB module memory during runtime compared from /proc/pagetrce:
           3068,         c020edd8, module_alloc   -- before
           2776,         c020edd8, module_alloc   -- after

Verify:
x301

Signed-off-by: Tao Zeng <tao.zeng@amlogic.com>
Change-Id: I15acee0df76f74a04c10d8f290d10fc35d51a283
This commit is contained in:
Tao Zeng
2020-08-07 17:34:30 +08:00
committed by Chris
parent fca514c91e
commit 9a149fa4b0
1 changed files with 6 additions and 0 deletions
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6
kernel/module.c
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@@ -2570,15 +2570,21 @@ static bool is_core_symbol(const Elf_Sym *src, const Elf_Shdr *sechdrs,
|| !src->st_name)
return false;
#ifndef CONFIG_AMLOGIC_MODIFY
#ifdef CONFIG_KALLSYMS_ALL
if (src->st_shndx == pcpundx)
return true;
#endif
#endif /* ignore all symbols of moulde been loaded */
sec = sechdrs + src->st_shndx;
if (!(sec->sh_flags & SHF_ALLOC)
#ifdef CONFIG_AMLOGIC_MODIFY
|| !(sec->sh_flags & SHF_EXECINSTR)
#else
#ifndef CONFIG_KALLSYMS_ALL
|| !(sec->sh_flags & SHF_EXECINSTR)
#endif
#endif
|| (sec->sh_entsize & INIT_OFFSET_MASK))
return false;