netdev - Re: [PATCH net-next 1/2] tcp: add tracing of skb/skaddr in tcp_event_sk

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Date: Mon, 4 Mar 2024 16:31:16 +0800
From: Jason Xing <kerneljasonxing@...il.com>
To: Eric Dumazet <edumazet@...gle.com>
Cc: mhiramat@...nel.org, mathieu.desnoyers@...icios.com, rostedt@...dmis.org, 
	netdev@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	Jason Xing <kernelxing@...cent.com>, Alexei Starovoitov <ast@...nel.org>
Subject: Re: [PATCH net-next 1/2] tcp: add tracing of skb/skaddr in
 tcp_event_sk_skb class

On Mon, Mar 4, 2024 at 4:24 PM Eric Dumazet <edumazet@...gle.com> wrote:
>
> On Thu, Feb 29, 2024 at 6:10 PM Jason Xing <kerneljasonxing@...il.com> wrote:
> >
> > From: Jason Xing <kernelxing@...cent.com>
> >
> > Prio to this patch, the trace function doesn't print addresses
> > which might be forgotten. As we can see, it already fetches
> > those, use it directly and it will print like below:
> >
> > ...tcp_retransmit_skb: skbaddr=XXX skaddr=XXX family=AF_INET...
>
> It was not forgotten, but a recommendation from Alexei
>
> https://yhbt.net/lore/all/20171010173821.6djxyvrggvaivqec@ast-mbp.dhcp.thefacebook.com/

Thanks, Eric.

Oh, good to see the old threads. I have to change the description. The
other reason why I chose to add address messages is we do have some
useful information when using trace ss another thread[1] does: it also
ships the trace with address printing.

[1]: https://lore.kernel.org/netdev/20240304034632.GA21357@didi-ThinkCentre-M920t-N000/

Thanks,
Jason