From: Jason Gunthorpe <jgg@nvidia.com>
To: Jakub Kicinski <kuba@kernel.org>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>,
Greg KH <gregkh@linuxfoundation.org>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Dan Williams <dan.j.williams@intel.com>,
ksummit@lists.linux.dev, linux-cxl@vger.kernel.org,
linux-rdma@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [MAINTAINERS SUMMIT] Device Passthrough Considered Harmful?
Date: Mon, 29 Jul 2024 12:29:38 -0300 [thread overview]
Message-ID: <20240729152938.GE3371438@nvidia.com> (raw)
In-Reply-To: <20240729075607.71ca5150@kernel.org>
On Mon, Jul 29, 2024 at 07:56:07AM -0700, Jakub Kicinski wrote:
> On Sun, 28 Jul 2024 11:49:44 -0400 James Bottomley wrote:
> > cross subsystem NAKs
>
> Could y'all please stop saying "cross subsystem NAKs"..
> It makes it sound like networking is nacking an addition to RDMA
> or storage.
Well, that is exactly what is happening. You are NAKing stuff we need
to operate RDMA, DPDK, and other parts of the device.
> The problem is that nVidia insists on making their proprietary
> gateway a "misc driver" usable in all subsystems.
Sigh, open code is not "proprietary", we've been over this.
fwctl manages the whole device, it is not tied to a subsystem and it
is not "usable" by any specific subsystem. This reflects the design of
HW/FW that is obviously not split up into per-Linux-subsystem
blocks. It is technically appropriate that is global and not somehow
weirdly split by subsystem.
I'm not going to backdoor generic full device fw access through RDMA
into the kernel.
> If they want to add something at the top level, all affected
> subsystems should have a say.
A say is fine, but it is not like netdev is suffering any real
technical harm to justify a full blown NAK fight like this.
Jason
next prev parent reply other threads:[~2024-07-29 15:29 UTC|newest]
Thread overview: 126+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-08 22:26 [MAINTAINERS SUMMIT] Device Passthrough Considered Harmful? Dan Williams
2024-07-09 6:09 ` Christoph Hellwig
2024-07-09 19:43 ` Dan Williams
2024-07-10 13:05 ` Jason Gunthorpe
2024-07-21 18:51 ` Laurent Pinchart
2024-07-22 13:27 ` Jason Gunthorpe
2024-07-09 10:01 ` Greg KH
2024-07-09 12:25 ` Leon Romanovsky
2024-07-09 12:33 ` Greg KH
2024-07-09 12:47 ` Leon Romanovsky
2024-07-11 14:07 ` Jason Gunthorpe
2024-07-09 20:09 ` Dan Williams
2024-07-09 16:02 ` James Bottomley
2024-07-09 22:15 ` Dan Williams
2024-07-10 13:22 ` Jonathan Cameron
2024-07-11 11:00 ` Jonathan Cameron
2024-07-11 15:05 ` Jason Gunthorpe
2024-07-11 17:01 ` Jonathan Cameron
2024-07-11 17:45 ` Jason Gunthorpe
2024-07-11 16:36 ` Dan Williams
2024-07-12 10:37 ` Jonathan Cameron
2024-07-21 19:25 ` Laurent Pinchart
2024-07-22 7:31 ` Leon Romanovsky
2024-07-22 8:53 ` Laurent Pinchart
2024-07-22 10:44 ` Leon Romanovsky
2024-07-22 11:10 ` Laurent Pinchart
2024-07-22 13:28 ` Leon Romanovsky
2024-07-22 14:13 ` Laurent Pinchart
2024-07-22 14:43 ` Jason Gunthorpe
2024-07-22 10:42 ` Ricardo Ribalda Delgado
2024-07-22 11:18 ` Laurent Pinchart
2024-07-22 11:56 ` Ricardo Ribalda Delgado
2024-07-25 20:01 ` Laurent Pinchart
2024-07-26 8:04 ` Ricardo Ribalda Delgado
2024-07-26 10:59 ` Laurent Pinchart
2024-07-26 15:40 ` Ricardo Ribalda Delgado
2024-07-28 17:18 ` Laurent Pinchart
2024-07-29 9:58 ` Ricardo Ribalda Delgado
2024-07-29 10:31 ` Laurent Pinchart
2024-07-31 11:54 ` Sakari Ailus
2024-07-31 13:15 ` Daniel Vetter
2024-08-02 15:07 ` Laurent Pinchart
2024-08-13 10:17 ` Tomasz Figa
2024-08-13 10:26 ` Laurent Pinchart
2024-08-13 10:33 ` Tomasz Figa
2024-08-13 10:58 ` Laurent Pinchart
2024-07-11 13:50 ` Jason Gunthorpe
2024-07-11 15:16 ` James Bottomley
2024-07-11 16:29 ` Jason Gunthorpe
2024-07-23 11:20 ` Jiri Kosina
2024-07-23 11:36 ` James Bottomley
2024-07-23 23:22 ` Jiri Kosina
2024-07-24 20:12 ` James Bottomley
2024-07-24 20:00 ` Laurent Pinchart
2024-07-24 20:37 ` James Bottomley
2024-07-24 21:10 ` Steven Rostedt
2024-07-25 19:31 ` Laurent Pinchart
2024-07-25 19:43 ` Jason Gunthorpe
2024-07-25 20:07 ` Laurent Pinchart
2024-07-25 23:39 ` Jason Gunthorpe
2024-07-26 8:04 ` Ricardo Ribalda Delgado
2024-07-26 12:49 ` Laurent Pinchart
2024-07-26 13:11 ` Jason Gunthorpe
2024-07-26 14:22 ` Laurent Pinchart
2024-07-26 15:43 ` Ricardo Ribalda Delgado
2024-07-28 15:25 ` Laurent Pinchart
2024-07-29 9:57 ` Ricardo Ribalda Delgado
2024-07-29 14:20 ` Jason Gunthorpe
2024-07-26 8:03 ` Ricardo Ribalda Delgado
2024-07-26 13:22 ` Laurent Pinchart
2024-07-26 15:44 ` Ricardo Ribalda Delgado
2024-07-28 17:02 ` Laurent Pinchart
2024-07-26 16:49 ` James Bottomley
2024-07-28 16:44 ` Laurent Pinchart
2024-07-26 17:33 ` Daniel Vetter
2024-07-29 14:10 ` Jason Gunthorpe
2024-07-25 9:26 ` Ricardo Ribalda Delgado
2024-07-25 10:51 ` Wolfram Sang
2024-07-25 12:23 ` Leon Romanovsky
2024-07-25 13:02 ` Ricardo Ribalda Delgado
2024-07-25 13:20 ` Leon Romanovsky
2024-07-25 13:29 ` Mark Brown
2024-07-25 14:18 ` Leon Romanovsky
2024-07-25 14:22 ` James Bottomley
2024-07-25 17:37 ` Leon Romanovsky
2024-07-26 13:58 ` James Bottomley
2024-07-25 19:42 ` Laurent Pinchart
2024-07-26 8:02 ` Ricardo Ribalda Delgado
2024-07-26 13:11 ` Laurent Pinchart
2024-07-26 15:40 ` Ricardo Ribalda Delgado
2024-07-28 11:23 ` Laurent Pinchart
2024-07-29 9:56 ` Ricardo Ribalda Delgado
2024-07-29 10:38 ` Laurent Pinchart
2024-07-26 16:01 ` James Bottomley
2024-07-26 17:56 ` Laurent Pinchart
2024-07-25 13:44 ` Steven Rostedt
2024-07-26 14:27 ` Laurent Pinchart
2024-07-26 15:34 ` Steven Rostedt
2024-07-28 16:03 ` Laurent Pinchart
2024-07-27 0:16 ` Dan Williams
2024-07-28 11:18 ` Laurent Pinchart
2024-07-28 15:16 ` Greg KH
2024-07-28 15:34 ` Laurent Pinchart
2024-07-28 15:49 ` James Bottomley
2024-07-29 6:10 ` Greg KH
2024-07-31 12:33 ` James Bottomley
2024-07-31 12:45 ` Laurent Pinchart
2024-08-01 14:41 ` Jason Gunthorpe
2024-08-07 0:06 ` Dan Williams
2024-08-07 0:13 ` James Bottomley
2024-08-16 11:12 ` Hannes Reinecke
2024-07-29 14:56 ` Jakub Kicinski
2024-07-29 15:16 ` Greg KH
2024-07-29 15:29 ` Jason Gunthorpe [this message]
2024-07-29 12:45 ` Jonathan Cameron
2024-07-29 13:38 ` Borislav Petkov
2024-07-29 14:29 ` Jonathan Cameron
2024-07-29 14:58 ` Jason Gunthorpe
2024-07-30 13:19 ` Borislav Petkov
2024-08-01 14:23 ` Jason Gunthorpe
2024-07-29 15:42 ` Jason Gunthorpe
2024-07-29 22:37 ` Dan Williams
2024-07-30 7:13 ` Daniel Vetter
2024-08-01 14:22 ` Jason Gunthorpe
2024-08-06 7:14 ` Daniel Vetter
2024-08-06 13:04 ` Jason Gunthorpe
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