diff options
| author | Eric Dumazet <edumazet@google.com> | 2026-02-04 05:30:23 +0000 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2026-02-05 16:33:52 +0100 |
| commit | 7a4cd71fa4514cd85df39b3cf99da8142660cdcd (patch) | |
| tree | cf3759770b1b3e173aa3c4917850e171424ab724 /include/linux/rmap.h | |
| parent | 770e112634e73349abb5b021ff9735dc18a4f176 (diff) | |
net: add vlan_get_protocol_offset_inline() helper
skb_protocol() is bloated, and forces slow stack canaries in many
fast paths.
Add vlan_get_protocol_offset_inline() which deals with the non-vlan
common cases.
__vlan_get_protocol_offset() is now out of line.
It returns a vlan_type_depth struct to avoid stack canaries in callers.
struct vlan_type_depth {
__be16 type;
u16 depth;
};
$ scripts/bloat-o-meter -t vmlinux.old vmlinux.new
add/remove: 0/2 grow/shrink: 0/22 up/down: 0/-6320 (-6320)
Function old new delta
vlan_get_protocol_dgram 61 59 -2
__pfx_skb_protocol 16 - -16
__vlan_get_protocol_offset 307 273 -34
tap_get_user 1374 1207 -167
ip_md_tunnel_xmit 1625 1452 -173
tap_sendmsg 940 753 -187
netif_skb_features 1079 866 -213
netem_enqueue 3017 2800 -217
vlan_parse_protocol 271 50 -221
tso_start 567 344 -223
fq_dequeue 1908 1685 -223
skb_network_protocol 434 205 -229
ip6_tnl_xmit 2639 2409 -230
br_dev_queue_push_xmit 474 236 -238
skb_protocol 258 - -258
packet_parse_headers 621 357 -264
__ip6_tnl_rcv 1306 1039 -267
skb_csum_hwoffload_help 515 224 -291
ip_tunnel_xmit 2635 2339 -296
sch_frag_xmit_hook 1582 1233 -349
bpf_skb_ecn_set_ce 868 457 -411
IP6_ECN_decapsulate 1297 768 -529
ip_tunnel_rcv 2121 1489 -632
ipip6_rcv 2572 1922 -650
Total: Before=24892803, After=24886483, chg -0.03%
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260204053023.1622775-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/linux/rmap.h')
0 files changed, 0 insertions, 0 deletions