linux-kernel - Re: [PATCH 0/6] virtio/vsock: introduce dgrams, sk

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Date:   Mon, 26 Sep 2022 21:44:29 +0000
From:   Bobby Eshleman <bobbyeshleman@...il.com>
To:     Stefano Garzarella <sgarzare@...hat.com>
Cc:     Bobby Eshleman <bobby.eshleman@...il.com>,
        Wei Liu <wei.liu@...nel.org>,
        Cong Wang <cong.wang@...edance.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Bobby Eshleman <bobby.eshleman@...edance.com>,
        Jiang Wang <jiang.wang@...edance.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Dexuan Cui <decui@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
        Stefan Hajnoczi <stefanha@...hat.com>, kvm@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-hyperv@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 0/6] virtio/vsock: introduce dgrams, sk_buff, and qdisc

On Mon, Sep 26, 2022 at 03:42:19PM +0200, Stefano Garzarella wrote:
> Hi,
> 
> On Mon, Aug 15, 2022 at 10:56:03AM -0700, Bobby Eshleman wrote:
> > Hey everybody,
> > 
> > This series introduces datagrams, packet scheduling, and sk_buff usage
> > to virtio vsock.
> 
> Just a reminder for those who are interested, tomorrow Sep 27 @ 16:00 UTC we
> will discuss more about the next steps for this series in this room:
> https://meet.google.com/fxi-vuzr-jjb
> (I'll try to record it and take notes that we will share)
> 
> Bobby, thank you so much for working on this! It would be great to solve the
> fairness issue and support datagram!
>

I appreciate that, thanks!

> I took a look at the series, left some comments in the individual patches,
> and add some advice here that we could pick up tomorrow:
> - it would be nice to run benchmarks (e.g., iperf-vsock, uperf, etc.) to
>   see how much the changes cost (e.g. sk_buff use)
> - we should take care also of other transports (i.e. vmci, hyperv), the
> uAPI should be as close as possible regardless of the transport
>

Duly noted. I have some measurements with uperf, I'll put the data
together and send that out here.

Regarding the uAPI topic, I'll save that topic for our conversation
tomorrow as I think the netdev topic will weigh on it.

> About the use of netdev, it seems the most controversial point and I
> understand Jakub and Michael's concerns. Tomorrow would be great if you can
> update us if you have found any way to avoid it, just reusing a packet
> scheduler somehow.
> It would be great if we could make it available for all transports (I'm not
> asking you to implement it for all, but to have a generic api that others
> can use).
>
> But we can talk about that tomorrow!

Sounds good, talk to you then!

Best,
Bobby