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[108.212.132.20]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d76ae68a4bsm14058432a34.19.2026.03.16.23.51.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Mar 2026 23:51:48 -0700 (PDT) From: Wesley Atwell To: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, horms@kernel.org, kuba@kernel.org, kuniyu@google.com, ncardwell@google.com, pabeni@redhat.com, shuah@kernel.org, Wesley Atwell Subject: [PATCH net-next 1/3] selftests: packetdrill: stop pinning rwnd in tcp_ooo_rcv_mss Date: Tue, 17 Mar 2026 00:51:35 -0600 Message-ID: <20260317065137.1533226-2-atwellwea@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260317065137.1533226-1-atwellwea@gmail.com> References: <20260317065137.1533226-1-atwellwea@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" tcp_ooo_rcv_mss.pkt cares about the OOO SACK state and the resulting tcpi_rcv_mss update. Its exact advertised receive-window value is incidental to that test and can legitimately move when unrelated rwnd accounting changes adjust the ACK window. Drop the hard-coded win 81 checks and keep only the ACK/SACK shape and the tcpi_rcv_mss assertion. Signed-off-by: Wesley Atwell --- tools/testing/selftests/net/packetdrill/tcp_ooo_rcv_mss.pkt | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/net/packetdrill/tcp_ooo_rcv_mss.pkt b/= tools/testing/selftests/net/packetdrill/tcp_ooo_rcv_mss.pkt index 7e6bc5fb0c8d78f36dc3d18842ff11d938c4e41b..0b19de9f9307b3d0ee579bc9e3a= 2b9219a88cd8a 100644 --- a/tools/testing/selftests/net/packetdrill/tcp_ooo_rcv_mss.pkt +++ b/tools/testing/selftests/net/packetdrill/tcp_ooo_rcv_mss.pkt @@ -17,11 +17,13 @@ sysctl -q net.ipv4.tcp_rmem=3D"4096 131072 $((32*1024*1= 024))"` +0 accept(3, ..., ...) =3D 4 =20 +0 < . 2001:11001(9000) ack 1 win 257 - +0 > . 1:1(0) ack 1 win 81 +// This test cares about the OOO SACK state and the resulting tcpi_rcv_mss. +// Keep the ACK/SACK shape exact, but do not pin the precise advertised +// receive window here because unrelated rwnd accounting changes can adjus= t it. + +0 > . 1:1(0) ack 1 =20 // check that ooo packet properly updates tcpi_rcv_mss +0 %{ assert tcpi_rcv_mss =3D=3D 1000, tcpi_rcv_mss }% =20 +0 < . 11001:21001(10000) ack 1 win 257 - +0 > . 1:1(0) ack 1 win 81 - + +0 > . 1:1(0) ack 1 --=20 2.43.0