From: Jason Gunthorpe <jgg@ziepe.ca>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>,
Parav Pandit <parav@mellanox.com>,
Jeff Kirsher <jeffrey.t.kirsher@intel.com>,
"davem@davemloft.net" <davem@davemloft.net>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
Dave Ertman <david.m.ertman@intel.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"nhorman@redhat.com" <nhorman@redhat.com>,
"sassmann@redhat.com" <sassmann@redhat.com>,
Kiran Patil <kiran.patil@intel.com>,
Alex Williamson <alex.williamson@redhat.com>,
"Bie, Tiwei" <tiwei.bie@intel.com>
Subject: Re: [net-next v2 1/1] virtual-bus: Implementation of Virtual Bus
Date: Wed, 20 Nov 2019 21:38:17 -0400 [thread overview]
Message-ID: <20191121013817.GA16914@ziepe.ca> (raw)
In-Reply-To: <20191120165748-mutt-send-email-mst@kernel.org>
On Wed, Nov 20, 2019 at 05:05:00PM -0500, Michael S. Tsirkin wrote:
> On Wed, Nov 20, 2019 at 12:45:25PM -0400, Jason Gunthorpe wrote:
> > > > For instance, this VFIO based approach might be very suitable to the
> > > > intel VF based ICF driver, but we don't yet have an example of non-VF
> > > > HW that might not be well suited to VFIO.
> > >
> > > I don't think we should keep moving the goalposts like this.
> >
> > It is ABI, it should be done as best we can as we have to live with it
> > for a long time. Right now HW is just starting to come to market with
> > VDPA and it feels rushed to design a whole subsystem style ABI around
> > one, quite simplistic, driver example.
>
> Well one has to enable hardware in some way. It's not really reasonable
> to ask for multiple devices to be available just so there's a driver and
> people can use them.
Er, this has actually been a fairly standard ask for new subsystems.
I think virtio is well grounded here compared to other things I've
seen, but it should still be done with a lot more NIC community involvement.
> At this rate no one will want to be the first to ship new devices ;)
Why?
> > > If people write drivers and find some infrastruture useful,
> > > and it looks more or less generic on the outset, then I don't
> > > see why it's a bad idea to merge it.
> >
> > Because it is userspace ABI, caution is always justified when defining
> > new ABI.
>
> Reasonable caution, sure. Asking Alex to block Intel's driver until
> someone else catches up and ships competing hardware isn't reasonable
> though. If that's your proposal I guess we'll have to agree to disagree.
Vendors may be willing to participate, as Mellanox is doing,
pre-product.
Jason
next prev parent reply other threads:[~2019-11-21 1:38 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-15 22:33 [net-next v2 1/1] virtual-bus: Implementation of Virtual Bus Jeff Kirsher
2019-11-15 23:25 ` Parav Pandit
2019-11-19 3:58 ` Ertman, David M
2019-11-19 4:31 ` Parav Pandit
2019-11-19 4:39 ` Parav Pandit
2019-11-19 17:46 ` Ertman, David M
2019-11-19 18:39 ` Jason Gunthorpe
2019-11-19 17:44 ` Ertman, David M
2019-11-19 4:08 ` Jason Wang
2019-11-19 4:36 ` Parav Pandit
2019-11-19 6:51 ` Jason Wang
2019-11-19 7:13 ` Parav Pandit
2019-11-19 7:37 ` Jason Wang
2019-11-19 15:14 ` Parav Pandit
2019-11-20 3:15 ` Jason Wang
2019-11-20 3:38 ` Parav Pandit
2019-11-20 4:07 ` Jason Wang
2019-11-20 13:41 ` Jason Gunthorpe
2019-11-21 4:06 ` Jason Wang
2019-11-20 8:52 ` Michael S. Tsirkin
2019-11-20 12:03 ` Jiri Pirko
2019-11-19 16:46 ` Jason Gunthorpe
2019-11-19 18:58 ` Michael S. Tsirkin
2019-11-19 19:03 ` Jason Gunthorpe
2019-11-19 21:34 ` Michael S. Tsirkin
2019-11-19 19:15 ` Jason Gunthorpe
2019-11-19 21:33 ` Michael S. Tsirkin
2019-11-19 23:10 ` Jason Gunthorpe
2019-11-20 0:16 ` Michael S. Tsirkin
2019-11-20 1:46 ` Jason Gunthorpe
2019-11-20 3:59 ` Jason Wang
2019-11-20 5:34 ` Jason Wang
2019-11-20 13:38 ` Jason Gunthorpe
2019-11-20 14:15 ` Michael S. Tsirkin
2019-11-20 17:28 ` Alex Williamson
2019-11-20 18:11 ` Jason Gunthorpe
2019-11-20 22:07 ` Alex Williamson
2019-11-20 22:39 ` Parav Pandit
2019-11-21 8:17 ` Jason Wang
2019-11-21 3:03 ` Jason Gunthorpe
2019-11-21 4:24 ` Michael S. Tsirkin
2019-11-21 13:44 ` Jason Gunthorpe
2019-11-23 16:50 ` Michael S. Tsirkin
2019-11-21 7:21 ` Jason Wang
2019-11-21 14:17 ` Jason Gunthorpe
2019-11-22 8:45 ` Jason Wang
2019-11-22 18:02 ` Jason Gunthorpe
2019-11-23 4:39 ` Tiwei Bie
2019-11-23 23:09 ` Jason Gunthorpe
2019-11-24 11:00 ` Michael S. Tsirkin
2019-11-24 14:56 ` Tiwei Bie
2019-11-25 0:07 ` Jason Gunthorpe
2019-11-24 14:51 ` Tiwei Bie
2019-11-24 15:07 ` Michael S. Tsirkin
2019-11-25 0:09 ` Jason Gunthorpe
2019-11-25 12:59 ` Jason Wang
2019-11-23 16:48 ` Michael S. Tsirkin
2019-11-21 5:22 ` Jason Wang
2019-11-21 6:59 ` Jason Wang
2019-11-21 3:52 ` Jason Wang
2019-11-20 7:38 ` Michael S. Tsirkin
2019-11-20 13:03 ` Jason Gunthorpe
2019-11-20 13:43 ` Michael S. Tsirkin
2019-11-20 14:30 ` Jason Gunthorpe
2019-11-20 14:57 ` Michael S. Tsirkin
2019-11-20 16:45 ` Jason Gunthorpe
2019-11-20 22:05 ` Michael S. Tsirkin
2019-11-21 1:38 ` Jason Gunthorpe [this message]
2019-11-21 4:53 ` Jason Wang
2019-11-20 3:29 ` Jason Wang
2019-11-20 3:24 ` Jason Wang
2019-11-20 13:33 ` Jason Gunthorpe
2019-11-21 3:57 ` Jason Wang
2019-11-21 15:10 ` Martin Habets
2019-11-22 9:13 ` Jason Wang
2019-11-22 16:19 ` Parav Pandit
2019-11-26 12:26 ` Martin Habets
2019-11-27 10:58 ` Jason Wang
2019-11-27 11:03 ` Jason Wang
2019-11-15 23:42 ` Parav Pandit
2019-11-18 7:48 ` Greg KH
2019-11-18 22:57 ` Ertman, David M
2019-11-19 8:04 ` Jason Wang
2019-11-19 17:50 ` Ertman, David M
2019-11-18 7:49 ` Greg KH
2019-11-18 22:55 ` Ertman, David M
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