netdev - Re: [PATCH net-next 00/13] Add mlx5 subfunction support

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Date:   Wed, 18 Nov 2020 18:14:23 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     Parav Pandit <parav@...dia.com>, Saeed Mahameed <saeed@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        Jiri Pirko <jiri@...dia.com>,
        "dledford@...hat.com" <dledford@...hat.com>,
        Leon Romanovsky <leonro@...dia.com>,
        "davem@...emloft.net" <davem@...emloft.net>
Subject: Re: [PATCH net-next 00/13] Add mlx5 subfunction support

On Tue, 17 Nov 2020 14:49:54 -0400 Jason Gunthorpe wrote:
> On Tue, Nov 17, 2020 at 09:11:20AM -0800, Jakub Kicinski wrote:
> 
> > > Just to refresh all our memory, we discussed and settled on the flow
> > > in [2]; RFC [1] followed this discussion.
> > > 
> > > vdpa tool of [3] can add one or more vdpa device(s) on top of already
> > > spawned PF, VF, SF device.  
> > 
> > Nack for the networking part of that. It'd basically be VMDq.  
> 
> What are you NAK'ing? 

Spawning multiple netdevs from one device by slicing up its queues.

> It is consistent with the multi-subsystem device sharing model we've
> had for ages now.
> 
> The physical ethernet port is shared between multiple accelerator
> subsystems. netdev gets its slice of traffic, so does RDMA, iSCSI,
> VDPA, etc.

Right, devices of other subsystems are fine, I don't care.

Sorry for not being crystal clear but quite frankly IDK what else can
be expected from me given the submissions have little to no context and
documentation. This comes up every damn time with the SF patches, I'm
tired of having to ask for a basic workflow.