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| author | Zhen Lei <thunder.leizhen@huawei.com> | 2022-11-02 11:49:16 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-25 13:03:16 +0300 |
| commit | da359f699f5942ca383f528d144fc17c7c95e78a (patch) | |
| tree | f0e5e71445eaa21e193c4343163d11ccec5ed603 /scripts/kallsyms.c | |
| parent | 3918cada8f1b247ad11a41872584232361e1d140 (diff) | |
| download | linux-da359f699f5942ca383f528d144fc17c7c95e78a.tar.xz | |
kallsyms: Reduce the memory occupied by kallsyms_seqs_of_names[]
[ Upstream commit 19bd8981dc2ee35fdc81ab1b0104b607c917d470 ]
kallsyms_seqs_of_names[] records the symbol index sorted by address, the
maximum value in kallsyms_seqs_of_names[] is the number of symbols. And
2^24 = 16777216, which means that three bytes are enough to store the
index. This can help us save (1 * kallsyms_num_syms) bytes of memory.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Stable-dep-of: b022f0c7e404 ("tracing/kprobes: Return EADDRNOTAVAIL when func matches several symbols")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'scripts/kallsyms.c')
| -rw-r--r-- | scripts/kallsyms.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c index 80aab2aa7224..ff8cce175784 100644 --- a/scripts/kallsyms.c +++ b/scripts/kallsyms.c @@ -602,7 +602,10 @@ static void write_src(void) sort_symbols_by_name(); output_label("kallsyms_seqs_of_names"); for (i = 0; i < table_cnt; i++) - printf("\t.long\t%u\n", table[i]->seq); + printf("\t.byte 0x%02x, 0x%02x, 0x%02x\n", + (unsigned char)(table[i]->seq >> 16), + (unsigned char)(table[i]->seq >> 8), + (unsigned char)(table[i]->seq >> 0)); printf("\n"); output_label("kallsyms_token_table"); |