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| author | Qiliang Yuan <realwujing@gmail.com> | 2026-01-20 05:32:34 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2026-01-20 22:32:28 +0300 |
| commit | f81c07a6e98e3171d0c4c5ab79f5aeff71b42c44 (patch) | |
| tree | 7742b4c51a866b0e60f8f4e63aaed53390097deb /include/linux | |
| parent | 713edc71449f122491f8860be49b40f27d5f46b5 (diff) | |
| download | linux-f81c07a6e98e3171d0c4c5ab79f5aeff71b42c44.tar.xz | |
bpf/verifier: Optimize ID mapping reset in states_equal
Currently, reset_idmap_scratch() performs a 4.7KB memset() in every
states_equal() call. Optimize this by using a counter to track used
ID mappings, replacing the O(N) memset() with an O(1) reset and
bounding the search loop in check_ids().
Signed-off-by: Qiliang Yuan <realwujing@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20260120023234.77673-1-realwujing@gmail.com
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/bpf_verifier.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/bpf_verifier.h b/include/linux/bpf_verifier.h index 130bcbd66f60..8355b585cd18 100644 --- a/include/linux/bpf_verifier.h +++ b/include/linux/bpf_verifier.h @@ -692,6 +692,7 @@ struct bpf_id_pair { struct bpf_idmap { u32 tmp_id_gen; + u32 cnt; struct bpf_id_pair map[BPF_ID_MAP_SIZE]; }; |