linux-kernel - Re: modprobe mlx5_core on OCI bare-metal instance causes unrecoverable hang and I/O error

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Message-ID: <20250207155456.GA3665725@ziepe.ca>
Date: Fri, 7 Feb 2025 11:54:56 -0400
From: Jason Gunthorpe <jgg@...pe.ca>
To: Mitchell Augustin <mitchell.augustin@...onical.com>
Cc: saeedm@...dia.com, leon@...nel.org, tariqt@...dia.com,
	andrew+netdev@...n.ch, "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org, Talat Batheesh <talatb@...dia.com>,
	Feras Daoud <ferasda@...dia.com>
Subject: Re: modprobe mlx5_core on OCI bare-metal instance causes
 unrecoverable hang and I/O error

On Wed, Feb 05, 2025 at 05:09:13PM -0600, Mitchell Augustin wrote:
> Hello,
> 
> I have identified a bug in the mlx5_core module, or some related component.
> 
> Doing the following on a freshly provisioned Oracle Cloud bare metal
> node with this configuration [0] will reliably cause the entire
> instance to become unresponsive:
> 
> rmmod mlx5_ib; rmmod mlx5_core; modprobe mlx5_core
> 
> This also produces the following output:
> 
> [  331.267175] I/O error, dev sda, sector 35602992 op 0x0:(READ) flags
> 0x80700 phys_seg 33 prio class 0

Is it using iscsi/srp/nfs/etc for any filesystems?

Jason