From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BCB42423E9C; Mon, 3 Aug 2026 21:30:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785792650; cv=none; b=Co7o5ZPixCbrmK4Xx5csJ8y37mcuLCtfKzcJ03jA61H+eWqioAbtRrELXIcW0fqz7jr36BhNT5k0Hkzd4fcd4NJ/cRrQU4HYodF5bvyxtdu4uSBN6nRtFwAYvABdKfn3EJjVQAwERGuQEGX4JL+pPhrgtbhz/mU8PQSaWWl0rf0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785792650; c=relaxed/simple; bh=wuM9EbhhJiB2G0uMaPtnh2/u+AVs9EjVNy4obLz+BEU=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=ufWO9Kto0Qd2Wlk7il2msd9HDqNBeKTaSbeMshYCmDzxnG7KEhC/5m1ARMyiWxP59YHn7LCxSIUo0Iqe9YIomWx0m1bw/1Ax9tjuwmcuYxUuoxO+CdHpwShtHFRl1N/wH2w5JLK0BXCycXzpf9C7WparJHe6uG6okYEN5+2/k90= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EGegQlIP; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EGegQlIP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98D7A1F000E9; Mon, 3 Aug 2026 21:30:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785792649; bh=TjcFIulPITLUnZ+fgXtOJI2vu9hxdAtgbHciEIOhdUA=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=EGegQlIPV4BvmMWZ7KanbAcmqqSgta9c97bBC5DptDB7kfOAGXFoQwfqMalljEau+ 2f9YHvnwudJzpmEK/FCxiGUBcTCx7nwbCT9bYAF/qfOmXdIFrwEIY3bZ2eCeiKK/rb UQf5GLl5OlMhI92hKDcOJD2+A7GOk75WDk+6bnkrLnkeU73uxoWTWYbArvMeKD5Pr/ hQnFmNHPHrXdWZHDf5RmJO8ZZg3abjYNPI/sRzJJd0cNOB389OnCy26R0Lc35Ls3fj GEPPPY07IVvYHQg+LAf0WG0JrsUpvcPqJYgMdnbtYQ/hErwMNuq6SMVw4o1OZPKnmy sTIBN5YP7fK/A== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id D09C83924461; Mon, 3 Aug 2026 21:30:11 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net] tcp: do not change rcv_ssthresh in tcp_measure_rcv_mss() From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178579261039.2840566.9155529941452764214.git-patchwork-notify@kernel.org> Date: Mon, 03 Aug 2026 21:30:10 +0000 References: <20260725030806.28135-1-zcgao@amazon.com> In-Reply-To: <20260725030806.28135-1-zcgao@amazon.com> To: Nathan Gao Cc: edumazet@google.com, ncardwell@google.com, kuniyu@google.com, davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Fri, 24 Jul 2026 20:08:06 -0700 you wrote: > Commit f5da7c45188e ("tcp: adjust rcvq_space after updating scaling > ratio") replaced the direct window_clamp update in tcp_measure_rcv_mss() > with a call to tcp_set_window_clamp(), a helper that implements the > TCP_WINDOW_CLAMP setsockopt. As a side effect, the helper also shrinks > rcv_ssthresh via __tcp_adjust_rcv_ssthresh(). > > As a result, each scaling_ratio decrease detected by > tcp_measure_rcv_mss() also cuts rcv_ssthresh. Elsewhere in TCP, > rcv_ssthresh is usually cut under memory pressure and grows via > tcp_grow_window(). > > [...] Here is the summary with links: - [net] tcp: do not change rcv_ssthresh in tcp_measure_rcv_mss() https://git.kernel.org/netdev/net/c/0e125ecfe20c You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html