linux-kernel - Re: [net-next v1 00/16] Device Memory TCP

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Message-ID: <20231210034807.kqspmykhxpkdtoiy@google.com>
Date:   Sun, 10 Dec 2023 03:48:07 +0000
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Mina Almasry <almasrymina@...gle.com>
Cc:     Shailend Chand <shailend@...gle.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-kselftest@...r.kernel.org,
        bpf@...r.kernel.org, linux-media@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Jeroen de Borst <jeroendb@...gle.com>,
        Praveen Kaligineedi <pkaligineedi@...gle.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        David Ahern <dsahern@...nel.org>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        "Christian König" <christian.koenig@....com>,
        Yunsheng Lin <linyunsheng@...wei.com>,
        Harshitha Ramamurthy <hramamurthy@...gle.com>
Subject: Re: [net-next v1 00/16] Device Memory TCP

On Thu, Dec 07, 2023 at 04:52:31PM -0800, Mina Almasry wrote:
[...]
> 
> Today, the majority of the Device-to-Device data transfers the network are

'the network' in above can be removed.

> implemented as the following low level operations: Device-to-Host copy,
> Host-to-Host network transfer, and Host-to-Device copy.
> 

[...]

> 
> ** Part 5: recvmsg() APIs
> 
> We define user APIs for the user to send and receive device memory.
> 
> Not included with this RFC is the GVE devmem TCP support, just to

no more RFC

> simplify the review. Code available here if desired:
> https://github.com/mina/linux/tree/tcpdevmem
> 
> This RFC is built on top of net-next with Jakub's pp-providers changes

no more RFC

[...]
> 
> ** Test Setup
> 
> Kernel: net-next with this RFC and memory provider API cherry-picked

no more RFC

> locally.
> 
> Hardware: Google Cloud A3 VMs.
> 
> NIC: GVE with header split & RSS & flow steering support.
>