From: Kurt Kanzenbach <kurt@linutronix.de>
To: Yangbo Lu <yangbo.lu@nxp.com>, netdev@vger.kernel.org
Cc: Yangbo Lu <yangbo.lu@nxp.com>,
Richard Cochran <richardcochran@gmail.com>,
Vladimir Oltean <vladimir.oltean@nxp.com>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Jonathan Corbet <corbet@lwn.net>, 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: Mon, 19 Apr 2021 08:46:33 +0200 [thread overview]
Message-ID: <87k0oyzs8m.fsf@kurt> (raw)
In-Reply-To: <20210416123655.42783-2-yangbo.lu@nxp.com>
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On Fri Apr 16 2021, 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.
>
> Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
PTP still works.
Tested-by: Kurt Kanzenbach <kurt@linutronix.de> # hellcreek
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next prev parent reply other threads:[~2021-04-19 6:46 UTC|newest]
Thread overview: 18+ 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
2021-04-20 7:40 ` Y.b. Lu
2021-04-18 15:08 ` Richard Cochran
2021-04-19 6:46 ` Kurt Kanzenbach [this message]
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
2021-04-16 16:37 ` kernel test robot
2021-04-16 16:37 ` kernel test robot
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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