linux-kernel - Re: [PATCH v2] net: calxedaxgmac: rework transmit ring handling

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Message-ID: <1350066620.21172.12996.camel@edumazet-glaptop>
Date:	Fri, 12 Oct 2012 20:30:20 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Rob Herring <robherring2@...il.com>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	jonathan@...masters.org,
	Mark Langsdorf <mark.langsdorf@...xeda.com>,
	Rob Herring <rob.herring@...xeda.com>,
	Ben Hutchings <bhutchings@...arflare.com>
Subject: Re: [PATCH v2] net: calxedaxgmac: rework transmit ring handling

On Fri, 2012-10-12 at 13:04 -0500, Rob Herring wrote:
> From: Rob Herring <rob.herring@...xeda.com>
> 
> Only generate tx interrupts on every ring size / 4 descriptors. Move the
> netif_stop_queue call to the end of the xmit function rather than
> checking at the beginning.
> 
> Signed-off-by: Rob Herring <rob.herring@...xeda.com>
> ---
> v2:
> - Add missed enabling of the descriptor tx interrupt

Seems to be net-next material to me.

Furthermore, your changelog is a bit terse for such a patch, that could
easily break upper layers.

You need to tell us how long TX completion for a packet might be
deferred.

Thanks


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