Managed to figure out why this was happening - I had the NUM_VFS in the
card firmware configured to 127 (the maximum value) - reducing this to a
lower number allowed me to successfully switch the cards into switchdev
mode at which point the ip tools all worked again.
The clue that pointed to this appeared when using the proposed 5.3 hwe
edge kernel:
[ 694.027106] infiniband (null): mlx5_ib_alloc_counters:5452:(pid
47479): couldn't allocate queue counter for port 128, err -12
(128 being the pertinent value)
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1849856
Title:
ip commands error with mellanox devices in switchdev mode
Status in iproute2 package in Ubuntu:
New
Status in linux package in Ubuntu:
New
Bug description:
Kernel: using 5.0.0-23-generic from hwe-edge
Configuring a mellanox connectx device with configured VF's into
switchdev (rather than legacy) mode result in the ip cli tool erroring
when trying to query the interface state:
$ sudo ip link
Error: Buffer too small for object.
Dump terminated
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: iproute2 4.15.0-2ubuntu1
ProcVersionSignature: Ubuntu 5.0.0-23.24~18.04.1-generic 5.0.15
Uname: Linux 5.0.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
Date: Fri Oct 25 14:55:36 2019
ProcEnviron:
TERM=screen-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C.UTF-8
SHELL=/bin/bash
SourcePackage: iproute2
UpgradeStatus: No upgrade log present (probably fresh install)
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