linux-kernel - Re: [PATCH net-next v2 1/1] net: stmmac: add per-queue TX & RX coalesce ethtool support

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Message-ID: <20210317135544.3da32504@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Wed, 17 Mar 2021 13:55:44 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Ong Boon Leong <boon.leong.ong@...el.com>
Cc:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 1/1] net: stmmac: add per-queue TX & RX
 coalesce ethtool support

On Wed, 17 Mar 2021 09:01:23 +0800 Ong Boon Leong wrote:
> Extending the driver to support per-queue RX and TX coalesce settings in
> order to support below commands:
> 
> To show per-queue coalesce setting:-
>  $ ethtool --per-queue <DEVNAME> queue_mask <MASK> --show-coalesce
> 
> To set per-queue coalesce setting:-
>  $ ethtool --per-queue <DEVNAME> queue_mask <MASK> --coalesce \
>      [rx-usecs N] [rx-frames M] [tx-usecs P] [tx-frames Q]
> 
> Signed-off-by: Ong Boon Leong <boon.leong.ong@...el.com>

Acked-by: Jakub Kicinski <kuba@...nel.org>

> +	if (queue < tx_cnt) {
> +		ec->tx_coalesce_usecs = priv->tx_coal_timer[queue];
> +		ec->tx_max_coalesced_frames = priv->tx_coal_frames[queue];
> +	} else {
> +		ec->tx_coalesce_usecs = 0;
> +		ec->tx_max_coalesced_frames = 0;

nit: I think the struct is initialized to 0 so there is no need to set
it explicitly.