netdev - Re: [pull request][net-next V10 00/14] Add mlx5 subfunction support

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Date:   Mon, 25 Jan 2021 10:35:27 -0800
From:   Edwin Peer <edwin.peer@...adcom.com>
To:     Parav Pandit <parav@...dia.com>
Cc:     Saeed Mahameed <saeed@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jason Gunthorpe <jgg@...dia.com>,
        netdev <netdev@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        Alexander Duyck <alexander.duyck@...il.com>,
        Sridhar Samudrala <sridhar.samudrala@...el.com>,
        David Ahern <dsahern@...nel.org>,
        Kiran Patil <kiran.patil@...el.com>,
        Jacob Keller <jacob.e.keller@...el.com>,
        "Ertman, David M" <david.m.ertman@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: Re: [pull request][net-next V10 00/14] Add mlx5 subfunction support

On Mon, Jan 25, 2021 at 2:57 AM Parav Pandit <parav@...dia.com> wrote:

> > Apologies for the tardy question out of left field, but I've been
> > thinking about this some more. If I recall, the primary motivation for
> > this was a means to effectively address more VFs? But, why can't the
> > device simply expose more bus numbers?
>
> Several weeks back, Jason already answered this VF scaling question from you at discussion [1].
>
> [1] https://lore.kernel.org/netdev/20201216023928.GG552508@nvidia.com/

True, although I didn't really consider the full cost argument at the
time because the core answer was "They can't", however, the fact is,
PCI can.

Regards,
Edwin Peer

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