netdev - Re: [RFC v2 00/10] HFI Virtual Network Interface Controller (VNIC)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 15 Dec 2016 13:19:18 -0500
From:   Doug Ledford <dledford@...hat.com>
To:     Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:     "ira.weiny" <ira.weiny@...el.com>,
        Leon Romanovsky <leon@...nel.org>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Vishwanathapura, Niranjana" <niranjana.vishwanathapura@...el.com>,
        linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
        dennis.dalessandro@...el.com
Subject: Re: [RFC v2 00/10] HFI Virtual Network Interface Controller (VNIC)

On 12/15/2016 12:07 PM, Jason Gunthorpe wrote:
> On Thu, Dec 15, 2016 at 11:28:06AM -0500, Doug Ledford wrote:
> 
>> 1) Since your intent is to make this work with multiple versions of the
>> hfi drivers, I disagree with Jason that just because there is only one
>> driver today that we should keep it simple.  Design it right from the
>> beginning of multi driver is your intent is, IMO, a better way to go.
>> You'll work out the bugs in the initial implementation and when it comes
>> time to add the second driver, things will go much more smoothly.
> 
> If that is your position then this should be a straight up IB ULP that
> works with any IB hardware.

Yes, see my comments in point #3 of my previous email...

> There is nothing HFI specific about it except for the
> micro-optimization of pushing packets via SDMA instead of post_send,
> and that same micro optimization probably applies to ipoib.
> 
> In other words, lets see the first version as a straight ULP with no
> special HFI hooks, then we can discuss how best to micro optimize it
> for HFI SDMA.
> 
> Jason
> 


-- 
Doug Ledford <dledford@...hat.com>
    GPG Key ID: 0E572FDD



Download attachment "signature.asc" of type "application/pgp-signature" (885 bytes)