linux-kernel - Re: [PATCH 2/2] ehea: Receive SKB Aggregation

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Message-ID: <OF7723C01B.9DD0E9DC-ONC12572F0.0040CA22-C12572F0.0042AC08@de.ibm.com>
Date:	Mon, 4 Jun 2007 14:09:47 +0200
From:	Christoph Raisch <RAISCH@...ibm.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Jan-Bernd Themann <themann@...ibm.com>,
	Jeff Garzik <jeff@...zik.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ppc <linuxppc-dev@...abs.org>,
	Marcus Eder <meder@...ibm.com>,
	netdev <netdev@...r.kernel.org>,
	Stefan Roscher <ossrosch@...ux.vnet.ibm.com>,
	ossthema@...ux.vnet.ibm.com, Thomas Q Klein <tklein@...ibm.com>,
	tklein@...ux.ibm.com
Subject: Re: [PATCH 2/2] ehea: Receive SKB Aggregation


Christoph Hellwig wrote on 31.05.2007 15:41:18:

> I'm still very unhappy with having all this in various drivers.  There's
> a lot of code that can be turned into generic library functions, and even
> more code that could be made generic with some amount of refactoring.

Yes, we'd also prefer to use a generic function, but we first would want to
get
some "real world" experience how our driver behaves with LRO to be even
able to
define requirements for such a generic function. A lot of this is tied into
pathlengths,
caching, and why does that help compared to a different TCP receive side
processing?
In a perfect world we shouldn't see a diffference if this is enabled or
not,
but measurements indicate something completely different at 10gbit.

Gruss / Regards
Christoph Raisch


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