netdev - RE: [PATCH v7 00/23] nvme-tcp receive offloads

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Date:   Thu, 27 Oct 2022 10:45:31 +0000
From:   Shai Malin <smalin@...dia.com>
To:     Sagi Grimberg <sagi@...mberg.me>,
        Aurelien Aptel <aaptel@...dia.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Tariq Toukan <tariqt@...dia.com>,
        "leon@...nel.org" <leon@...nel.org>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "hch@....de" <hch@....de>, "kbusch@...nel.org" <kbusch@...nel.org>,
        "axboe@...com" <axboe@...com>,
        Chaitanya Kulkarni <chaitanyak@...dia.com>
CC:     Or Gerlitz <ogerlitz@...dia.com>, Yoray Zack <yorayz@...dia.com>,
        Boris Pismenny <borisp@...dia.com>,
        "aurelien.aptel@...il.com" <aurelien.aptel@...il.com>,
        "malin1024@...il.com" <malin1024@...il.com>
Subject: RE: [PATCH v7 00/23] nvme-tcp receive offloads

On Thu, 27 Oct 2022 at 11:35, Sagi Grimberg <sagi@...mberg.me> wrote:
> > Hi,
> >
> > The nvme-tcp receive offloads series v7 was sent to both net-next and
> > nvme.  It is the continuation of v5 which was sent on July 2021
> > https://lore.kernel.org/netdev/20210722110325.371-1-borisp@nvidia.com/ .
> > V7 is now working on a real HW.
> >
> > The feature will also be presented in netdev this week
> > https://netdevconf.info/0x16/session.html?NVMeTCP-Offload-%E2%80%93-
> Implementation-and-Performance-Gains
> >
> > Currently the series is aligned to net-next, please update us if you will prefer
> otherwise.
> >
> > Thanks,
> > Shai, Aurelien
> 
> Hey Shai & Aurelien
> 
> Can you please add in the next time documentation of the limitations
> that this offload has in terms of compatibility? i.e. for example (from
> my own imagination):
> 1. bonding/teaming/other-stacking?
> 2. TLS (sw/hw)?
> 3. any sort of tunneling/overlay?
> 4. VF/PF?
> 5. any nvme features?
> 6. ...
> 
> And what are your plans to address each if at all.
> 
> Also, does this have a path to userspace? for example almost all
> of the nvme-tcp targets live in userspace.
> 
> I don't think I see in the code any limits like the maximum
> connections that can be offloaded on a single device/port. Can
> you share some details on this?
> 
> Thanks.

Sure, we add it.