On Wed, Jan 21, 2026 at 4:59 AM Eric Dumazet [off-list ref] wrote:

tcp_rate_check_app_limited() is used from tcp_sendmsg_locked()
fast path and from other callers.

Move it to tcp.c so that it can be inlined in tcp_sendmsg_locked().

Small increase of code, for better TCP performance.

$ scripts/bloat-o-meter -t vmlinux.old vmlinux.new
add/remove: 0/0 grow/shrink: 1/0 up/down: 87/0 (87)
Function                                     old     new   delta
tcp_sendmsg_locked                          4217    4304     +87
Total: Before=22566462, After=22566549, chg +0.00%

Signed-off-by: Eric Dumazet <edumazet@google.com>
---

Reviewed-by: Neal Cardwell <ncardwell@google.com>

Thanks, Eric!

neal