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

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Message-ID: <20100115100011.076505bf@marrow.netinsight.se>
Date:	Fri, 15 Jan 2010 10:00:11 +0100
From:	Simon Kagstrom <simon.kagstrom@...insight.net>
To:	David Miller <davem@...emloft.net>
Cc:	krkumar2@...ibm.com, ilpo.jarvinen@...sinki.fi,
	netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [RFC] [PATCH] Optimize TCP sendmsg in favour of fast devices?

On Fri, 15 Jan 2010 00:52:24 -0800 (PST)
David Miller <davem@...emloft.net> wrote:

> > The same thing goes for via-velocity.c, it's turned on via ethtool
> > though (ethtool_op_set_sg).
> 
> Indeed, see my reply to Krishna's ethtool_op_set_sg() patch.
> 
> I think it's a cruddy way to do things, SG ought to be on by
> default always unless it is defective.  And if it's defective
> support should be removed entirely.

I kept it off by default since I didn't see any big improvement in my
tests (negative in some, positive in some). But I suppose you're
right though.

// Simon
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