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| author | Peter Zijlstra <peterz@infradead.org> | 2020-03-10 20:43:35 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-03-25 20:28:28 +0300 |
| commit | 530389968739883a61192767e1c215653ba4ba2b (patch) | |
| tree | d2963d5d64e6c16f6d72ef84053fc34dda57db35 /tools/objtool/elf.h | |
| parent | 1e11f3fdc326d7466e43185ea943b6156143387c (diff) | |
| download | linux-530389968739883a61192767e1c215653ba4ba2b.tar.xz | |
objtool: Optimize find_section_by_index()
In order to avoid a linear search (over 20k entries), add an
section_hash to the elf object.
This reduces objtool on vmlinux.o from a few minutes to around 45
seconds.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lkml.kernel.org/r/20200324160924.381249993@infradead.org
Diffstat (limited to 'tools/objtool/elf.h')
| -rw-r--r-- | tools/objtool/elf.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/objtool/elf.h b/tools/objtool/elf.h index 12229801b13f..8c272eb515c8 100644 --- a/tools/objtool/elf.h +++ b/tools/objtool/elf.h @@ -25,6 +25,7 @@ struct section { struct list_head list; + struct hlist_node hash; GElf_Shdr sh; struct list_head symbol_list; struct list_head rela_list; @@ -71,6 +72,7 @@ struct elf { char *name; struct list_head sections; DECLARE_HASHTABLE(symbol_hash, 20); + DECLARE_HASHTABLE(section_hash, 16); }; |