netdev - Re: [RFC] [PATCH] Optimize TCP sendmsg in favour of fast devices?

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Message-ID: <20100129090720.GE23140@gondor.apana.org.au>
Date:	Fri, 29 Jan 2010 22:07:20 +1300
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Krishna Kumar2 <krkumar2@...ibm.com>
Cc:	David Miller <davem@...emloft.net>, eric.dumazet@...il.com,
	ilpo.jarvinen@...sinki.fi, netdev@...r.kernel.org
Subject: Re: [RFC] [PATCH] Optimize TCP sendmsg in favour of fast devices?

On Wed, Jan 27, 2010 at 03:12:48PM +0530, Krishna Kumar2 wrote:
> 
> I should have mentioned this too - if I unset F_SG in the
> cxgb3 driver and nothing else, ethtool -k still shows GSO
> is set, and tcpdump shows max packet size is 1448. If I
> additionally set GSO in driver, then ethtool still has the
> same output, but tcpdump shows max packet size of 65160.

This sounds like a bug.

Cheers,
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