linux-kernel - Re: [PATCH net-next v3 2/6] selftests: ncdevmem: Implement devmem TCP TX

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Message-ID: <20250204085008.1adf89ea@kernel.org>
Date: Tue, 4 Feb 2025 08:50:08 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Paolo Abeni <pabeni@...hat.com>
Cc: Mina Almasry <almasrymina@...gle.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
 kvm@...r.kernel.org, virtualization@...ts.linux.dev,
 linux-kselftest@...r.kernel.org, Donald Hunter <donald.hunter@...il.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Simon Horman <horms@...nel.org>, Jonathan Corbet
 <corbet@....net>, Andrew Lunn <andrew+netdev@...n.ch>, Neal Cardwell
 <ncardwell@...gle.com>, David Ahern <dsahern@...nel.org>, "Michael S.
 Tsirkin" <mst@...hat.com>, Jason Wang <jasowang@...hat.com>, Xuan Zhuo
 <xuanzhuo@...ux.alibaba.com>, Eugenio Pérez
 <eperezma@...hat.com>, Stefan Hajnoczi <stefanha@...hat.com>, Stefano
 Garzarella <sgarzare@...hat.com>, Shuah Khan <shuah@...nel.org>,
 sdf@...ichev.me, asml.silence@...il.com, dw@...idwei.uk, Jamal Hadi Salim
 <jhs@...atatu.com>, Victor Nogueira <victor@...atatu.com>, Pedro Tammela
 <pctammela@...atatu.com>, Samiullah Khawaja <skhawaja@...gle.com>
Subject: Re: [PATCH net-next v3 2/6] selftests: ncdevmem: Implement devmem
 TCP TX

On Tue, 4 Feb 2025 13:29:18 +0100 Paolo Abeni wrote:
> On 2/3/25 11:39 PM, Mina Almasry wrote:
> > Add support for devmem TX in ncdevmem.
> > 
> > This is a combination of the ncdevmem from the devmem TCP series RFCv1
> > which included the TX path, and work by Stan to include the netlink API
> > and refactored on top of his generic memory_provider support.
> > 
> > Signed-off-by: Mina Almasry <almasrymina@...gle.com>
> > Signed-off-by: Stanislav Fomichev <sdf@...ichev.me>  
> 
> Usually the self-tests are included towards the end of the series, to
> help reviewers building-up on previous patches knowledge.

I had the same reaction, but in cases where uAPI is simpler than 
the core code it may actually help the understanding to start with
the selftest. Dunno. Only concern would be that the test won't work
if someone bisects to this commit, but that's not very practical?