From: Richard Cochran <richardcochran@gmail.com>
To: Yangbo Lu <yangbo.lu@nxp.com>
Cc: netdev@vger.kernel.org, Vladimir Oltean <vladimir.oltean@nxp.com>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Kurt Kanzenbach <kurt@linutronix.de>,
Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Claudiu Manoil <claudiu.manoil@nxp.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
UNGLinuxDriver@microchip.com, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [net-next 1/3] net: dsa: optimize tx timestamp request handling
Date: Sun, 18 Apr 2021 08:06:23 -0700 [thread overview]
Message-ID: <20210418150623.GA24506@hoboy.vegasvil.org> (raw)
In-Reply-To: <20210416123655.42783-2-yangbo.lu@nxp.com>
On Fri, Apr 16, 2021 at 08:36:53PM +0800, Yangbo Lu wrote:
> Optimization could be done on dsa_skb_tx_timestamp(), and dsa device
> drivers should adapt to it.
>
> - Check SKBTX_HW_TSTAMP request flag at the very beginning, instead of in
> port_txtstamp, so that most skbs not requiring tx timestamp just return.
>
> - No longer to identify PTP packets, and limit tx timestamping only for PTP
> packets. If device driver likes, let device driver do.
>
> - It is a waste to clone skb directly in dsa_skb_tx_timestamp().
> For one-step timestamping, a clone is not needed. For any failure of
> port_txtstamp (this may usually happen), the skb clone has to be freed.
> So put skb cloning into port_txtstamp where it really needs.
This patch changes three things ^^^ at once. These are AFAICT
independent changes, and so please break this one patch into three for
easier review.
Thanks,
Richard
next prev parent reply other threads:[~2021-04-18 15:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-16 12:36 [net-next 0/3] Support ocelot PTP Sync one-step timestamping Yangbo Lu
2021-04-16 12:36 ` [net-next 1/3] net: dsa: optimize tx timestamp request handling Yangbo Lu
2021-04-18 9:18 ` Vladimir Oltean
2021-04-18 15:11 ` Richard Cochran
2021-04-20 7:39 ` Y.b. Lu
2021-04-20 7:48 ` Y.b. Lu
2021-04-18 15:06 ` Richard Cochran [this message]
2021-04-20 7:40 ` Y.b. Lu
2021-04-18 15:08 ` Richard Cochran
2021-04-19 6:46 ` Kurt Kanzenbach
2021-04-16 12:36 ` [net-next 2/3] net: mscc: ocelot: convert to ocelot_port_txtstamp_request() Yangbo Lu
2021-04-18 9:27 ` Vladimir Oltean
2021-04-16 12:36 ` [net-next 3/3] net: mscc: ocelot: support PTP Sync one-step timestamping Yangbo Lu
2021-04-18 9:46 ` Vladimir Oltean
2021-04-20 7:33 ` Y.b. Lu
2021-04-20 8:20 ` Vladimir Oltean
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