linux-kernel - Re: [PATCH] ehea: Receive SKB Aggregation

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Message-ID: <20070508121527.GA16763@infradead.org>
Date:	Tue, 8 May 2007 13:15:27 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Thomas Klein <osstklei@...ibm.com>
Cc:	Jeff Garzik <jeff@...zik.org>,
	Christoph Raisch <raisch@...ibm.com>,
	Jan-Bernd Themann <ossthema@...ibm.com>,
	Jan-Bernd Themann <themann@...ibm.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ppc <linuxppc-dev@...abs.org>,
	Marcus Eder <meder@...ibm.com>,
	netdev <netdev@...r.kernel.org>,
	Thomas Klein <tklein@...ibm.com>,
	Stefan Roscher <ossrosch@...ux.vnet.ibm.com>
Subject: Re: [PATCH] ehea: Receive SKB Aggregation

On Tue, May 08, 2007 at 02:05:33PM +0200, Thomas Klein wrote:
> This patch enables the receive side processing to aggregate TCP packets within
> the HEA device driver. It analyses the packets already received after a
> interrupt arrived and forwards these as a chains of SKBs for the same TCP
> connection with modified header field. We have seen a lower CPU load and
> improved throughput for small numbers of parallel TCP connections.
> 
> We added a disabled module parameter to prevent disruption of normal driver
> operation.
> We currently consider this as "experimental" until further review and tests
> have been passed.
> 
> Are there any concerns about including this in the mainline driver?

So we grow yet another LRO copy in drivers?  I think someone needs to
bite the bullet and make it generic.

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