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[204.195.120.218]) by smtp.gmail.com with ESMTPSA id n12-20020a170903110c00b0016d4f05eb95sm12613859plh.272.2022.10.06.09.31.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Oct 2022 09:31:32 -0700 (PDT) Date: Thu, 6 Oct 2022 09:31:30 -0700 From: Stephen Hemminger To: Dattu Gundu Cc: "users@dpdk.org" Subject: Re: qdisc errors on Azure VM (TAP Config) Message-ID: <20221006093130.544efb26@hermes.local> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org On Thu, 6 Oct 2022 06:08:59 +0000 Dattu Gundu wrote: > Hi, > > I am observing the below errors during the bootup of Azure VM. > > I understand these errors started popping from DPDK 20.11.1 due to extended ack support was added in Linux version 4.17 > And used for diagnosing the TAP config in kernel. > > Is it because we are trying to delete the qdisc before they are created ? > And looks like the failure is per queue. > > Am I missing any packages ? > > How to avoid these errors ? > If they are not serious, is there a way to suppress them ? > > net_vdev_netvsc: probably using routed NetVSC interface "s0p0" (index 7) > tap_nl_dump_ext_ack(): Cannot delete qdisc with handle of zero > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > net_vdev_netvsc: probably using routed NetVSC interface "s1p0" (index 8) > tap_nl_dump_ext_ack(): Cannot delete qdisc with handle of zero > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid > > Currently using below kernel: > 5.4.17 > x86_64 > GNU/Linux > #3 SMP PREEMPT Thu Aug 18 05:23:39 UTC 2022 > > Thanks, > Raghava Dattu. If possible use netvsc PMD and not the older vdev_netvsc/failsafe/tap stuff. Are you sure your kernel has all the necessary qdisc to run the failsafe/tap device. It needs to have flower, mirred, mqprio, etc.