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Mon, 17 Nov 2025 22:03:22 -0800 (PST) Received: from fedora ([209.132.188.88]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2985c2b0d17sm160149605ad.72.2025.11.17.22.03.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Nov 2025 22:03:21 -0800 (PST) Date: Tue, 18 Nov 2025 06:03:17 +0000 From: Hangbin Liu To: Jakub Kicinski Cc: netdev@vger.kernel.org Subject: Re: [TEST] bond_macvlan_ipvlan.sh flakiness Message-ID: References: <20251114082014.750edfad@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Nov 17, 2025 at 08:24:35AM +0000, Hangbin Liu wrote: > > If it's ipvlan that fails rather than macvlan there is a bunch of > > otherhost drops: > > > > # 17: ipvlan0@if15: mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 > > # link/ether 00:0a:0b:0c:0d:01 brd ff:ff:ff:ff:ff:ff link-netns s-8BLcCn > > # RX: bytes packets errors dropped missed mcast > > # 702 10 0 0 0 3 > > # RX errors: length crc frame fifo overrun otherhost > > # 0 0 0 0 0 4 > > Hmm, this one is suspicious. I can reproduce the ping fail on local. > But no "otherhost" issue. I will check the failure recently. This looks like a time-sensitive issue, with diff --git a/tools/testing/selftests/drivers/net/bonding/bond_macvlan_ipvlan.sh b/tools/testing/selftests/drivers/net/bonding/bond_macvlan_ipvlan.sh index c4711272fe45..947c85ec2cbb 100755 --- a/tools/testing/selftests/drivers/net/bonding/bond_macvlan_ipvlan.sh +++ b/tools/testing/selftests/drivers/net/bonding/bond_macvlan_ipvlan.sh @@ -30,6 +30,7 @@ check_connection() local message=${3} RET=0 + sleep 1 ip netns exec ${ns} ping ${target} -c 4 -i 0.1 &>/dev/null check_err $? "ping failed" log_test "${bond_mode}/${xvlan_type}_${xvlan_mode}: ${message}" I run the test 100 times (vng with 4 cpus) and not able to reproduce it anymore. That maybe why debug kernel works good. I need some time to figure out what configure affect the issue. Thanks Hangbin