netdev - Re: [PATCH net] tcp: take care of zero tp->window_clamp in tcp_set

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Message-Id: 
 <175978287249.1522677.593941136577699237.git-patchwork-notify@kernel.org>
Date: Mon, 06 Oct 2025 20:34:32 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Eric Dumazet <edumazet@...gle.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, horms@...nel.org,
 ncardwell@...gle.com, willemb@...gle.com, kuniyu@...gle.com,
 netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net] tcp: take care of zero tp->window_clamp in
 tcp_set_rcvlowat()

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Fri,  3 Oct 2025 18:41:19 +0000 you wrote:
> Some applications (like selftests/net/tcp_mmap.c) call SO_RCVLOWAT
> on their listener, before accept().
> 
> This has an unfortunate effect on wscale selection in
> tcp_select_initial_window() during 3WHS.
> 
> For instance, tcp_mmap was negotiating wscale 4, regardless
> of tcp_rmem[2] and sysctl_rmem_max.
> 
> [...]

Here is the summary with links:
  - [net] tcp: take care of zero tp->window_clamp in tcp_set_rcvlowat()
    https://git.kernel.org/netdev/net/c/21b29e74ffe5

You are awesome, thank you!
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