From: Andrew Lunn <andrew@lunn.ch>
To: Jiawen Wu <jiawenwu@trustnetic.com>
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH net-next 01/14] net: txgbe: Add build support for txgbe ethernet driver
Date: Thu, 12 May 2022 17:52:16 +0200 [thread overview]
Message-ID: <Yn0tML4HmEAnNARr@lunn.ch> (raw)
In-Reply-To: <20220511032659.641834-2-jiawenwu@trustnetic.com>
> +Disable LRO if enabling ip forwarding or bridging
> +-------------------------------------------------
> +WARNING: The txgbe driver supports the Large Receive Offload (LRO) feature.
> +This option offers the lowest CPU utilization for receives but is completely
> +incompatible with *routing/ip forwarding* and *bridging*. If enabling ip
> +forwarding or bridging is a requirement, it is necessary to disable LRO using
> +compile time options as noted in the LRO section later in this document. The
> +result of not disabling LRO when combined with ip forwarding or bridging can be
> +low throughput or even a kernel panic.
Please could you tell us more. Is this a hardware/firmware issue? A
know bug in your driver you cannot find?
And why is it a compile time option, not ethtool -k?
> +ethtool
> +-------
> +The driver utilizes the ethtool interface for driver configuration and
> +diagnostics, as well as displaying statistical information. The latest
> +ethtool version is required for this functionality.
And will this still be true in 5 years time?
> +Disable GRO when routing/bridging
> +---------------------------------
> +Due to a known kernel issue, GRO must be turned off when routing/bridging. GRO
> +can be turned off via ethtool::
What kernel issue?
Andrew
next prev parent reply other threads:[~2022-05-12 15:52 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-11 3:26 [PATCH net-next 00/14] Wangxun 10 Gigabit Ethernet Driver Jiawen Wu
2022-05-11 3:26 ` [PATCH net-next 01/14] net: txgbe: Add build support for txgbe ethernet driver Jiawen Wu
2022-05-12 0:38 ` kernel test robot
2022-05-12 15:52 ` Andrew Lunn [this message]
2022-05-11 3:26 ` [PATCH net-next 02/14] net: txgbe: Add hardware initialization Jiawen Wu
2022-05-12 5:15 ` kernel test robot
2022-05-11 3:26 ` [PATCH net-next 03/14] net: txgbe: Add operations to interact with firmware Jiawen Wu
2022-05-11 3:26 ` [PATCH net-next 04/14] net: txgbe: Add PHY interface support Jiawen Wu
2022-05-12 12:21 ` Andrew Lunn
2022-05-11 3:26 ` [PATCH net-next 05/14] net: txgbe: Add interrupt support Jiawen Wu
2022-05-11 3:26 ` [PATCH net-next 06/14] net: txgbe: Support to receive and tranmit packets Jiawen Wu
2022-05-11 3:26 ` [PATCH net-next 07/14] net: txgbe: Support flow control Jiawen Wu
2022-05-11 3:26 ` [PATCH net-next 08/14] net: txgbe: Support flow director Jiawen Wu
2022-05-11 3:26 ` [PATCH net-next 09/14] net: txgbe: Support PTP Jiawen Wu
2022-05-11 3:26 ` [PATCH net-next 10/14] net: txgbe: Add ethtool support Jiawen Wu
2022-05-12 12:11 ` Andrew Lunn
2022-05-11 3:26 ` [PATCH net-next 11/14] net: txgbe: Support PCIe recovery Jiawen Wu
2022-05-11 3:26 ` [PATCH net-next 12/14] net: txgbe: Support power management Jiawen Wu
2022-05-11 3:26 ` [PATCH net-next 13/14] net: txgbe: Support debug filesystem Jiawen Wu
2022-05-12 11:56 ` Andrew Lunn
2022-05-11 3:26 ` [PATCH net-next 14/14] net: txgbe: Support sysfs file system Jiawen Wu
2022-05-12 11:43 ` Andrew Lunn
2022-05-12 0:54 ` [PATCH net-next 00/14] Wangxun 10 Gigabit Ethernet Driver Jakub Kicinski
[not found] ` <004401d865e4$c3073d10$4915b730$@trustnetic.com>
2022-05-12 15:57 ` Jakub Kicinski
2022-05-12 22:06 ` Andrew Lunn
[not found] ` <001201d86671$61c86410$25592c30$@trustnetic.com>
2022-05-13 12:27 ` Andrew Lunn
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