On Sun, Jul 20, 2025 at 8:16 PM <fan....@zte.com.cn> wrote:
>
> From: Fan Yu <fan....@zte.com.cn>
>
> Background
> ==========
> When TCP retransmits a packet due to missing ACKs, the
> retransmission may fail for various reasons (e.g., packets
> stuck in driver queues, receiver zero windows, or routing issues).
>
> The original tcp_retransmit_skb tracepoint:
>
> 'commit e086101b150a ("tcp: add a tracepoint for tcp retransmission")'
>
> lacks visibility into these failure causes, making production
> diagnostics difficult.
>
>
> Suggested-by: Jakub Kicinski <k...@kernel.org>
> Suggested-by: Eric Dumazet <eduma...@google.com>
> Co-developed-by: xu xin <xu.xi...@zte.com.cn>
> Signed-off-by: xu xin <xu.xi...@zte.com.cn>
> Signed-off-by: Fan Yu <fan....@zte.com.cn>
> Reviewed-by: Kuniyuki Iwashima <kun...@google.com>
Please do not add a Suggested-by tag when the original idea did not
come from someone else.
I only made suggestions to make your patch better.
Reviewed-by: Eric Dumazet <eduma...@google.com>
