From: Jakub Kicinski Date: Thu, 22 Jan 2026 03:28:34 +0000 (-0800) Subject: Merge branch 'gro-inline-tcp6_gro_-receive-complete' X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9de76f55b9f856b317773e106253051fb33a9e92;p=thirdparty%2Fkernel%2Flinux.git Merge branch 'gro-inline-tcp6_gro_-receive-complete' Eric Dumazet says: ==================== gro: inline tcp6_gro_{receive,complete} On some platforms, GRO stack is too deep and causes cpu stalls. Decreasing call depths by one shows a 1.5 % gain on Zen2 cpus. (32 RX queues, 100Gbit NIC, RFS enabled, tcp_rr with 128 threads and 10,000 flows) We can go further by inlining ipv6_gro_{receive,complete} and take care of IPv4 if there is interest. Note: two temporary __always_inline will be replaced with inline_for_performance when/if available. Cumulative size increase for this series (of 3): $ scripts/bloat-o-meter -t vmlinux.0 vmlinux.3 add/remove: 2/2 grow/shrink: 5/1 up/down: 1572/-471 (1101) Function old new delta ipv6_gro_receive 1069 1846 +777 ipv6_gro_complete 433 733 +300 tcp6_check_fraglist_gro - 272 +272 tcp6_gro_complete 227 306 +79 tcp4_gro_complete 325 397 +72 ipv6_offload_init 218 274 +56 __pfx_tcp6_check_fraglist_gro - 16 +16 __pfx___skb_incr_checksum_unnecessary 32 - -32 __skb_incr_checksum_unnecessary 186 - -186 tcp6_gro_receive 959 706 -253 Total: Before=22592724, After=22593825, chg +0.00% ==================== Link: https://patch.msgid.link/20260120164903.1912995-1-edumazet@google.com Signed-off-by: Jakub Kicinski --- 9de76f55b9f856b317773e106253051fb33a9e92