Re: failed to allocate device WQ

[Zhu Yanjun <yanjun.zhu@linux.dev>]

在 2024/12/20 18:10, Holger Kiehl 写道:
> Hello,
> 
> since upgrading from kernel 6.10 to 6.11 (also 6.12) one Infiniband
> card sometimes hits this error:
> 
>     kernel: workqueue: Failed to create a rescuer kthread for wq "ipoib_wq": -EINTR
>     kernel: ib0: failed to allocate device WQ
>     kernel: mlx5_1: failed to initialize device: ib0 port 1 (ret = -12)
>     kernel: mlx5_1: couldn't register ipoib port 1; error -12
> 
> The system has two cards:
> 
>     41:00.0 Infiniband controller: Mellanox Technologies MT28908 Family [ConnectX-6]
>     c4:00.0 Infiniband controller: Mellanox Technologies MT28908 Family [ConnectX-6]
> 
> If that happens one cannot use that card for TCP/IP communication. It does
> not always happen, but when it does it always happens with the second
> card mlx5_1. Never with mlx5_0. This happens on four different systems.
> 
> Any idea what I can do to stop this from happening?
> 
> Regards,
> Holger
> 
> PS: Firmware for both cards is 20.41.1000

It is very possible that FW is not compatible with the driver. IMO, you 
can make tests with Mellanox OFED.

If the driver is compatible with FW, this problem should disappear.

Zhu Yanjun