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[31.183.213.56]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c260d4aa5acsm111956666b.12.2026.09.04.07.03.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Sep 2026 07:03:36 -0700 (PDT) From: Kuba Pawlak To: netdev@vger.kernel.org Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, shuah@kernel.org, kuniyu@amazon.com, Copilot <223556219+Copilot@users.noreply.github.com> Subject: [PATCH net-next] selftests: net: Skip so_incoming_cpu on single-CPU systems Date: Fri, 4 Sep 2026 16:03:34 +0200 Message-ID: <20260904140334.562593-1-kuba.pawlak@canonical.com> X-Mailer: git-send-email 2.43.0 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" The test requires at least two CPUs to exercise the distribution of connections between per-CPU listeners. It currently enforces this prerequisite with an assertion, causing all test cases to fail on single-vCPU systems even though no kernel functionality was tested. Report the unsupported environment as a skip instead. Check the prerequisite before setting up the network namespace so skipped tests do not make unnecessary system changes. Link: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/2023546 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Signed-off-by: Kuba Pawlak --- tools/testing/selftests/net/so_incoming_cpu.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/net/so_incoming_cpu.c b/tools/testing/= selftests/net/so_incoming_cpu.c index 4740701f1..1b7344238 100644 --- a/tools/testing/selftests/net/so_incoming_cpu.c +++ b/tools/testing/selftests/net/so_incoming_cpu.c @@ -81,10 +81,11 @@ static int nr_client_per_server, nr_server, nr_client; =20 FIXTURE_SETUP(so_incoming_cpu) { - setup_netns(_metadata); - nr_server =3D get_nprocs(); - ASSERT_LE(2, nr_server); + if (nr_server < 2) + SKIP(return, "requires at least two CPUs"); + + setup_netns(_metadata); =20 if (NR_CLIENT_PER_SERVER_DEFAULT * nr_server < NR_PORT) nr_client_per_server =3D NR_CLIENT_PER_SERVER_DEFAULT; --=20 2.43.0