Re: [RESEDN PATCH mptcp-net] mptcp: update window_clamp on subflows when SO_RCVBUF is set

[gang.yan@linux.dev]

-------- Forwarded message -------

From: gang.yan@linux.dev mailto:gang.yan@linux.dev 
To: "Matthieu Baerts" <matttbe@kernel.org mailto:matttbe@kernel.org?to=%22Matthieu%20Baerts%22%20%3Cmatttbe%40kernel.org%3E >
Sent: April 20, 2026 at 5:30 PM
Subject: Re: [RESEDN PATCH mptcp-net] mptcp: update window_clamp on subflows when SO_RCVBUF is set

April 20, 2026 at 5:24 PM, "Matthieu Baerts" <matttbe@kernel.org mailto:matttbe@kernel.org?to=%22Matthieu%20Baerts%22%20%3Cmatttbe%40kernel.org%3E > wrote:



> 
> Hi Gang,
>  
>  On 20/04/2026 10:56, Gang Yan wrote:
>  
>  
>  From: Gang Yan <yangang@kylinos.cn>
>  
>  Add __mptcp_subflow_set_rcvbuf() helper that calls the tcp_set_rcvbuf
>  to update window_clamp, in addition to writing sk_rcvbuf. Use it in
>  both mptcp_sol_socket_sync_intval() (setsockopt path) and
>  sync_socket_options() (new subflow creation path).
>  
>  I didn't review the code yet, but just a note for next time: please
>  don't use the RESEND tag if you did a modification, even if it is only
>  in the commit message. Instead, increment the version and add a
>  changelog describing the modifications.
> 
Thanks for the advice and reminder!

The reason I sent this patch with the RESEND tag is that I wanted to
trigger the CI checks, especially the AI reivew, to see if there are any
issues that need to be fixed. It seems my previous patch didn't properly
trigger those tests.

Thanks
Gang

> 
> Cheers,
>  Matt
>  -- 
>  Sponsored by the NGI0 Core fund.
>