[dpdk-dev] [PATCH 1/1] net/mlx5: fix device probing for old kernel drivers

[Slava Ovsiienko]

The patch allowing to retrieve the network interface index and name via Netlink:
https://www.spinics.net/lists/linux-rdma/msg62948.html
In Linux tree: 5b2cc79d (Leon Romanovsky 2018-03-27 20:40:49 +0300 270)

So, the problem depends on ib_core module version - 4.16 supports getting
ifindex via Netlink, 4.15 does not. Mellanox OFED brings its own ib_core
module, that's why it works over ancient 3.10.327.

I'll update log message of my patch to describe the matter.

With best regards,
Slava

> -----Original Message-----
> From: Slava Ovsiienko
> Sent: Friday, April 5, 2019 12:38
> To: 'David Christensen' <drc at linux.vnet.ibm.com>; dev at dpdk.org
> Cc: Shahaf Shuler <shahafs at mellanox.com>; Ali Alnubani
> <alialnu at mellanox.com>
> Subject: RE: [dpdk-dev] [PATCH 1/1] net/mlx5: fix device probing for old
> kernel drivers
> 
> > -----Original Message-----
> > From: David Christensen <drc at linux.vnet.ibm.com>
> > Sent: Thursday, April 4, 2019 22:06
> > To: Slava Ovsiienko <viacheslavo at mellanox.com>; dev at dpdk.org
> > Cc: Shahaf Shuler <shahafs at mellanox.com>
> > Subject: Re: [dpdk-dev] [PATCH 1/1] net/mlx5: fix device probing for
> > old kernel drivers
> >
> > > Retrieving network interface index via Netlink fails in case of old
> > > mlx5 kernel drivers installed
> >> Can you put a boundary on this statement with a kernel driver version?
> >
> > Dave
> 
> As far as I know this setup experiences the problem (I debugged on):
> 4.15.32+
> Ubuntu 16.04.5 LTS
> mlx5_core 5.0-0  (from Linux Upstream)
> standalone ConnextX-4LX virtual function
> 
> These setups has no problem:
> 3.10.0-327
> Red Hat7.2
> mlx5_core 4.6-0.2.0 (from OFED)
> standalone ConnextX-4LX physical function
> 
> 5.0rc7+
> Red Hat 7.5
> mlx5_core 5.0-0
> standalone ConnextX-4LX physical function
> 
> I'll try to get more information regarding other problematic configs.
> 
> Regards,
> Slava