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Message-ID: <40d6352e-8c6b-404f-8b6a-df1816239ab0@nvidia.com>
Date:   Wed, 26 Oct 2022 17:00:01 +0300
From:   Gal Pressman <gal@...dia.com>
To:     Guangbin Huang <huangguangbin2@...wei.com>, davem@...emloft.net,
        kuba@...nel.org, mkubecek@...e.cz, andrew@...n.ch,
        amitc@...lanox.com, idosch@...sch.org, danieller@...dia.com,
        jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
        jdike@...toit.com, richard@....at, anton.ivanov@...bridgegreys.com,
        netanel@...zon.com, akiyano@...zon.com, gtzalik@...zon.com,
        saeedb@...zon.com, chris.snook@...il.com,
        ulli.kroll@...glemail.com, linus.walleij@...aro.org,
        jeroendb@...gle.com, csully@...gle.com, awogbemila@...gle.com,
        jdmason@...zu.us, rain.1986.08.12@...il.com, zyjzyj2000@...il.com,
        kys@...rosoft.com, haiyangz@...rosoft.com, mst@...hat.com,
        jasowang@...hat.com, doshir@...are.com, pv-drivers@...are.com,
        jwi@...ux.ibm.com, kgraul@...ux.ibm.com, hca@...ux.ibm.com,
        gor@...ux.ibm.com, johannes@...solutions.net
Cc:     netdev@...r.kernel.org, lipeng321@...wei.com,
        chenhao288@...ilicon.com, linux-s390@...r.kernel.org
Subject: Re: [PATCH V7 net-next 0/6] ethtool: add support to set/get tx
 copybreak buf size and rx buf len

On 18/11/2021 14:12, Guangbin Huang wrote:
> From: Hao Chen <chenhao288@...ilicon.com>
>
> This series add support to set/get tx copybreak buf size and rx buf len via
> ethtool and hns3 driver implements them.
>
> Tx copybreak buf size is used for tx copybreak feature which for small size
> packet or frag. Use ethtool --get-tunable command to get it, and ethtool
> --set-tunable command to set it, examples are as follow:
>
> 1. set tx spare buf size to 102400:
> $ ethtool --set-tunable eth1 tx-buf-size 102400
>
> 2. get tx spare buf size:
> $ ethtool --get-tunable eth1 tx-buf-size
> tx-buf-size: 102400

Hi Guangbin,
Can you please clarify the difference between TX copybreak and TX
copybreak buf size?

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