qdisc errors on Azure VM (TAP Config)

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From: Dattu Gundu <dattu.gundu@oracle.com>
To: "users@dpdk.org" <users@dpdk.org>
Subject: qdisc errors on Azure VM (TAP Config)
Date: Thu, 6 Oct 2022 06:08:59 +0000	[thread overview]
Message-ID: <PH0PR10MB443736423182D0C8576F337B905C9@PH0PR10MB4437.namprd10.prod.outlook.com> (raw)

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.

next             reply	other threads:[~2022-10-06  6:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-06  6:08 Dattu Gundu [this message]
2022-10-06 16:31 ` Stephen Hemminger
2022-10-10  8:05   ` [External] : " Dattu Gundu
2022-10-10 14:56     ` Stephen Hemminger
2022-10-12 11:14       ` Dattu Gundu
2022-10-12 17:11         ` Stephen Hemminger
2022-10-17  9:13           ` Dattu Gundu
2022-10-17 15:01             ` Stephen Hemminger

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