Fwd: rdma link add NAME type rxe netdev IFACE stopped working

Fwd: rdma link add NAME type rxe netdev IFACE stopped working

[Bob Pearson]

-------- Forwarded Message --------
Subject: rdma link add NAME type rxe netdev IFACE stopped working
Date: Wed, 1 Sep 2021 22:04:03 -0500
From: Bob Pearson <rpearsonhpe@gmail.com>
To: Jason Gunthorpe <jgg@nvidia.com>, Zhu Yanjun <zyjzyj2000@gmail.com>, linux-rdma@vger.linux.org

rdma link has started to fail today reporting an error as follows after working before.

bob@ubunto-21:~$ sudo rdma link add rxe0 type rxe netdev enp0s3

error: Invalid argument

bob@ubunto-21:

Nothing has changed in the past day or two except I pulled recent changes into rdma-core. This runs after
typing

export LD_LIBRARY_PATH=/home/bob/src/rdma-core/build/lib/:/usr/local/lib:/usr/lib

which is also the same. Any ideas?

Bob

Re: rdma link add NAME type rxe netdev IFACE stopped working

[Bob Pearson]

On 9/1/21 10:04 PM, Bob Pearson wrote:
> rdma link has started to fail today reporting an error as follows after working before.
> 
> bob@ubunto-21:~$ sudo rdma link add rxe0 type rxe netdev enp0s3
> 
> error: Invalid argument
> 
> bob@ubunto-21:
> 
> Nothing has changed in the past day or two except I pulled recent changes into rdma-core. This runs after
> typing
> 
> export LD_LIBRARY_PATH=/home/bob/src/rdma-core/build/lib/:/usr/local/lib:/usr/lib
> 
> which is also the same. Any ideas?
> 
> Bob
> 

Update. I then recompiled the kernel after pulling latest changes and now it works. In theory this shouldn't be necessary. The kernel APIs should be beckwards compatible.

Bob

Re: rdma link add NAME type rxe netdev IFACE stopped working

[Jason Gunthorpe]

On Wed, Sep 01, 2021 at 10:25:25PM -0500, Bob Pearson wrote:
> On 9/1/21 10:04 PM, Bob Pearson wrote:
> > rdma link has started to fail today reporting an error as follows after working before.
> > 
> > bob@ubunto-21:~$ sudo rdma link add rxe0 type rxe netdev enp0s3
> > 
> > error: Invalid argument
> > 
> > bob@ubunto-21:
> > 
> > Nothing has changed in the past day or two except I pulled recent changes into rdma-core. This runs after
> > typing
> > 
> > export LD_LIBRARY_PATH=/home/bob/src/rdma-core/build/lib/:/usr/local/lib:/usr/lib
> > 
> > which is also the same. Any ideas?
> > 
> > Bob
> > 
> 
> Update. I then recompiled the kernel after pulling latest changes
> and now it works. In theory this shouldn't be necessary. The kernel
> APIs should be beckwards compatible.

I don't think anything has changed here in a long time, so I have no
guess

'rdma link' has no relation to rdma-core either

Perhaps your kernel got in a bad state?

Jason

Re: rdma link add NAME type rxe netdev IFACE stopped working

[Bob Pearson]

On 9/2/21 8:02 AM, Jason Gunthorpe wrote:
> On Wed, Sep 01, 2021 at 10:25:25PM -0500, Bob Pearson wrote:
>> On 9/1/21 10:04 PM, Bob Pearson wrote:
>>> rdma link has started to fail today reporting an error as follows after working before.
>>>
>>> bob@ubunto-21:~$ sudo rdma link add rxe0 type rxe netdev enp0s3
>>>
>>> error: Invalid argument
>>>
>>> bob@ubunto-21:
>>>
>>> Nothing has changed in the past day or two except I pulled recent changes into rdma-core. This runs after
>>> typing
>>>
>>> export LD_LIBRARY_PATH=/home/bob/src/rdma-core/build/lib/:/usr/local/lib:/usr/lib
>>>
>>> which is also the same. Any ideas?
>>>
>>> Bob
>>>
>>
>> Update. I then recompiled the kernel after pulling latest changes
>> and now it works. In theory this shouldn't be necessary. The kernel
>> APIs should be beckwards compatible.
> 
> I don't think anything has changed here in a long time, so I have no
> guess
> 
> 'rdma link' has no relation to rdma-core either
> 
> Perhaps your kernel got in a bad state?
> 
> Jason
> 

Must have. Thanks. -- Bob