netdev - Re: [PATCH mlx5-next v7 0/4] Dynamically assign MSI-X vectors count

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Date:   Fri, 26 Mar 2021 14:31:28 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Keith Busch <kbusch@...nel.org>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Alexander Duyck <alexander.duyck@...il.com>,
        Leon Romanovsky <leon@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-pci <linux-pci@...r.kernel.org>,
        linux-rdma@...r.kernel.org, Netdev <netdev@...r.kernel.org>,
        Don Dutile <ddutile@...hat.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        "David S . Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH mlx5-next v7 0/4] Dynamically assign MSI-X vectors count

On Sat, Mar 27, 2021 at 02:29:00AM +0900, Keith Busch wrote:
> On Fri, Mar 26, 2021 at 12:08:31PM -0500, Bjorn Helgaas wrote:
> > I also want to resurrect your idea of associating
> > "sriov_vf_msix_count" with the PF instead of the VF.  I really like
> > that idea, and it better reflects the way both mlx5 and NVMe work.
> 
> That is a better match for nvme: we can assign resources to VFs with
> the PF's "VF Enable" set to '0', so configuring VFs without requiring
> them be enumerated in sysfs is a plus. 

If the VF is not in sysfs already in the normal place, why would it be
in the special configuration directory? Do you want the driver to
somehow provide the configuration directory content?

I'm confused what you mean

As I said to Alex configuring things before they even get plugged in
sounds like the right direction..

Jason