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[34.48.33.21]) by smtp.gmail.com with UTF8SMTPSA id 00721157ae682-794d7cceafdsm4958417b3.15.2026.02.01.13.00.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Feb 2026 13:00:07 -0800 (PST) Date: Sun, 01 Feb 2026 16:00:07 -0500 From: Willem de Bruijn To: Steffen Trumtrar , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Richard Cochran , Willem de Bruijn , Andrew Lunn , =?UTF-8?B?RXVnZW5pbyBQw6lyZXo=?= Cc: virtualization@lists.linux.dev, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Steffen Trumtrar Message-ID: In-Reply-To: <20260129-v6-7-topic-virtio-net-ptp-v2-0-30a27dc52760@pengutronix.de> References: <20260129-v6-7-topic-virtio-net-ptp-v2-0-30a27dc52760@pengutronix.de> Subject: Re: [PATCH RFC v2 0/2] virtio-net: add flow filter for receive timestamps Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Steffen Trumtrar wrote: > This series tries to pick up the work on the virtio-net timestamping > feature from Willem de Bruijn. > > Original series > Message-Id: 20210208185558.995292-1-willemdebruijn.kernel@gmail.com > Subject: [PATCH RFC v2 0/4] virtio-net: add tx-hash, rx-tstamp, > tx-tstamp and tx-time > From: Willem de Bruijn > > RFC for four new features to the virtio network device: > > 1. pass tx flow state to host, for routing + telemetry > 2. pass rx tstamp to guest, for better RTT estimation > 3. pass tx tstamp to guest, idem > 3. pass tx delivery time to host, for accurate pacing > > All would introduce an extension to the virtio spec. > > The changes in this series are to the driver side. For the changes to qemu see: > https://github.com/strumtrar/qemu/tree/v10.2.0/virtio-rx-stamps > > Currently only virtio-net is supported. Performance was tested with > pktgen which doesn't show a decrease in transfer speeds. > > As these patches are now mostly different from the initial patchset, I removed > the Signed-off-bys from Willem, so he mustn't be ashamed of what his work evolved to ;) Good to see this picked up. I would also still like to see support in virtio-net for HW timestamps pass-through for virtio-net. > Signed-off-by: Steffen Trumtrar > --- > Changes in v2: > - rework patches to use flow filter instead of feature flag > - Link to v1: https://lore.kernel.org/r/20231218-v6-7-topic-virtio-net-ptp-v1-0-cac92b2d8532@pengutronix.de > > --- > Steffen Trumtrar (2): > tun: support rx-tstamp > virtio-net: support receive timestamp > > drivers/net/tun.c | 30 +++++---- > drivers/net/virtio_net.c | 136 ++++++++++++++++++++++++++++++++++++---- > include/uapi/linux/virtio_net.h | 9 +++ > 3 files changed, 151 insertions(+), 24 deletions(-) > --- > base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8 > change-id: 20231218-v6-7-topic-virtio-net-ptp-3df023bc4f4d > > Best regards, > -- > Steffen Trumtrar >