linux-kernel - Re: [PATCH for-next v9 0/5] On-Demand Paging on SoftRoCE

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Message-ID: <20250219133847.GM3696814@ziepe.ca>
Date: Wed, 19 Feb 2025 09:38:47 -0400
From: Jason Gunthorpe <jgg@...pe.ca>
To: "Daisuke Matsuda (Fujitsu)" <matsuda-daisuke@...itsu.com>
Cc: "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"leon@...nel.org" <leon@...nel.org>,
	"zyjzyj2000@...il.com" <zyjzyj2000@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"rpearsonhpe@...il.com" <rpearsonhpe@...il.com>,
	"Zhijian Li (Fujitsu)" <lizhijian@...itsu.com>,
	Joe Klein <joe.klein812@...il.com>
Subject: Re: [PATCH for-next v9 0/5] On-Demand Paging on SoftRoCE

On Wed, Feb 19, 2025 at 10:48:25AM +0000, Daisuke Matsuda (Fujitsu) wrote:
> On Thu, Jan 30, 2025 7:52 PM Daisuke Matsuda (Fujitsu):
> > On Tue, Jan 14, 2025 5:16 AM Jason Gunthorpe:
> > > On Mon, Jan 13, 2025 at 02:15:27PM +0100, Joe Klein wrote:
> > >
> > > > > > > Possibly, there was a regression in libibverbs between v39.0-1 and v50.0-2build2.
> > > > > > > We need to take a closer look to resolve the malfunction of rxe on Ubuntu 24.04.
> > > > > >
> > > > > > That's distressing.
> > 
> > I am going to start bisecting the root cause to fix it.
> > It may take a while, so please stay patient.
> 
> On Ubuntu 22.04.5, both v50.0 branch and master branch pass the pyverbs testcases,
> so it is not a regression of libibverbs. However, on Ubuntu 24.04.1, the test causes
> segmentation fault with both branches. The issue looks specific to Ubuntu 24.04.
> 
> Could it be possible the update of python version leads to the
> failure? 

Or a cython update? It certainly could..

So maybe there is nothing to worry about kernel side if the test case
passes on older OS userspace

Jason