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[144.49.247.16]) by smtp-relay.gmail.com with ESMTPS id d9443c01a7336-2b9ca9c6b45sm9106925ad.13.2026.05.05.11.27.23 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 May 2026 11:27:23 -0700 (PDT) X-Relaying-Domain: broadcom.com X-CFilter-Loop: Reflected Received: by mail-qv1-f69.google.com with SMTP id 6a1803df08f44-8b3fecf1e02so6891306d6.3 for ; Tue, 05 May 2026 11:27:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1778005642; x=1778610442; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=nGNm7c854bmsEYSmmRpo3hBYxzAKRiuBt/6viyvE9RM=; b=TWlmJD/fcJT1MZPj75aqWVeWnzjzrf6PsNjZmvGHMuhHCGMgQ0Ul72gJK4GuNMb9DX MiHzWxZIhfZ+UHr/XNXZ7eHEz9WcT0Wk2H9YTlNUi5AWfJ1HgYHQTUgI8IB4A/3Gz/gM +VFic31X8XOafKkvaXvkgq41i04VvcC3gWWMo= X-Forwarded-Encrypted: i=1; AFNElJ/WTm81pxxEQmRFFCMqwBdHvipDht5oe9FLRKXhW3ntFsJjE/+oKoxTDh/lF7JELrhH2aalCF5R3Zd9d17ofGU=@vger.kernel.org X-Received: by 2002:ad4:5d4d:0:b0:8ac:afca:a68f with SMTP id 6a1803df08f44-8baf24a16a3mr45786796d6.1.1778005642411; Tue, 05 May 2026 11:27:22 -0700 (PDT) X-Received: by 2002:ad4:5d4d:0:b0:8ac:afca:a68f with SMTP id 6a1803df08f44-8baf24a16a3mr45786396d6.1.1778005641958; Tue, 05 May 2026 11:27:21 -0700 (PDT) Received: from photon-d7fac424c0d3 ([192.19.161.250]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8b53c6b688csm170263516d6.33.2026.05.05.11.27.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 May 2026 11:27:21 -0700 (PDT) From: Ankit Jain To: edumazet@google.com Cc: kuba@kernel.org, netdev@vger.kernel.org, davem@davemloft.net, pabeni@redhat.com, ncardwell@google.com, kuniyu@google.com, horms@kernel.org, shuah@kernel.org, quic_subashab@quicinc.com, quic_stranche@quicinc.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, karen.badiryan@broadcom.com, ajay.kaher@broadcom.com, alexey.makhalov@broadcom.com, vamsi-krishna.brahmajosyula@broadcom.com, yin.ding@broadcom.com, tapas.kundu@broadcom.com Subject: Re: [PATCH net v2 2/2] selftests/net: add packetdrill test for locked SO_RCVBUF SWS Date: Tue, 5 May 2026 18:23:29 +0000 Message-ID: <20260505182329.15353-1-ankit-aj.jain@broadcom.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-DetectorID-Processed: b00c1d49-9d2e-4205-b15f-d015386d3d5e Thanks for the review. > I do not see the SWS effect you want to avoid in the first place. > > This test is an ad-hoc test about your change, but I still do not see > why recomputing tp->ratio every time the rcvmss is increased is an > issue on loopback interface. For the packetdrill script, it is taking more time. To actually show the window dropping to 0, I have to write a long script with many packets and application reads. This is because TCP does not shrink the right edge of an already open window. Since the C-code fix in Patch 1 is tested and working fine, should I send v3 with just the code fix first? I can work on the packetdrill script and send it later in a separate patch. Or should I wait and send both together? Kindly suggest how I should proceed. Thanks, Ankit