Re: Unable to create max_qp QPs on Mellanox ConnectX-4/6

[Leon Romanovsky <leon@kernel.org>]

On Mon, Jul 18, 2022 at 03:10:48PM +0300, Leon Romanovsky wrote:
> On Mon, Jul 18, 2022 at 03:48:26AM +0000, Tung, Chien Tin wrote:
> > > On Thu, Jul 14, 2022 at 02:20:06PM +0000, Tung, Chien Tin wrote:
> > > > No one is interested in helping with Create QP issue with Mellanox
> > > controller?
> > > 
> > > 1. Both Jason and I had personal issues that prevented from us to
> > > participate in linux-rdma ML.
> > Okay,, I don't know what that means but I won't dwell on it.
> > 
> > > 2. max_qp is set by FW. Please contact NVidia support.
> > I sent this issue to the mailing list because with different kernel I get different
> > number with 5.18.5 creating 1/2 of QPs as RHEL 8.5/MOFED.
> > If you still think this is a FW issue, I can certainly take it up with support.
> 
> We already started internal discussion about it. The observed behavior is
> a combination of FW issues together with very questionable kernel patch
> that tried to overcome them.

We are working to provide more comprehensive fix, but for now, you can
revert the following patch: 7f839965b2d7 ("net/mlx5: Update log_max_qp value to be 17 at most")

Thanks

> 
> Thanks