netdev - Re: [PATCH net-next] tcp: move sk_forced_mem

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Message-ID: <CADVnQyktV_z9=SoT7yhkT6mBQKRjaJgpwLhR2SdWGQS3iKD3Tw@mail.gmail.com>
Date: Fri, 23 Jan 2026 10:52:04 -0500
From: Neal Cardwell <ncardwell@...gle.com>
To: Eric Dumazet <edumazet@...gle.com>
Cc: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, 
	Kuniyuki Iwashima <kuniyu@...gle.com>, netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net-next] tcp: move sk_forced_mem_schedule() to tcp.c

On Fri, Jan 23, 2026 at 6:16 AM Eric Dumazet <edumazet@...gle.com> wrote:
>
> TCP fast path can (auto)inline this helper, instead
> of (auto)inling it from tcp_send_fin().
>
> No change of overall code size, but tcp_sendmsg() is faster.
>
> $ scripts/bloat-o-meter -t vmlinux.old vmlinux.new
> add/remove: 0/0 grow/shrink: 1/1 up/down: 141/-140 (1)
> Function                                     old     new   delta
> tcp_stream_alloc_skb                         216     357    +141
> tcp_send_fin                                 688     548    -140
> Total: Before=22236729, After=22236730, chg +0.00%
>
> BTW, we might change tcp_send_fin() to use tcp_stream_alloc_skb().
>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---

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

Thanks, Eric!

neal