netdev - Re: [PATCH net-next v3 2/2] trace: tcp: Add tracepoint for tcp_sendmsg

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Message-ID: <CANn89iKr2kfCakou8id62C5ic95HF5RCps9a2cUv5FL3yjAGdg@mail.gmail.com>
Date: Wed, 9 Apr 2025 09:13:53 +0200
From: Eric Dumazet <edumazet@...gle.com>
To: Breno Leitao <leitao@...ian.org>
Cc: David Ahern <dsahern@...nel.org>, Neal Cardwell <ncardwell@...gle.com>, 
	Kuniyuki Iwashima <kuniyu@...zon.com>, Steven Rostedt <rostedt@...dmis.org>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
	"David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Simon Horman <horms@...nel.org>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, netdev@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	kernel-team@...a.com
Subject: Re: [PATCH net-next v3 2/2] trace: tcp: Add tracepoint for tcp_sendmsg_locked()

On Tue, Apr 8, 2025 at 8:32 PM Breno Leitao <leitao@...ian.org> wrote:
>
> Add a tracepoint to monitor TCP send operations, enabling detailed
> visibility into TCP message transmission.
>
> Create a new tracepoint within the tcp_sendmsg_locked function,
> capturing traditional fields along with size_goal, which indicates the
> optimal data size for a single TCP segment. Additionally, a reference to
> the struct sock sk is passed, allowing direct access for BPF programs.
> The implementation is largely based on David's patch[1] and suggestions.
>
> Link: https://lore.kernel.org/all/70168c8f-bf52-4279-b4c4-be64527aa1ac@kernel.org/ [1]
> Signed-off-by: Breno Leitao <leitao@...ian.org>

Reviewed-by: Eric Dumazet <edumazet@...gle.com>