netdev - Re: [net-next PATCH] via-velocity: Enable scatter/gather IO by default

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Message-ID: <20100217071944.14183e50@marrow.netinsight.se>
Date:	Wed, 17 Feb 2010 07:19:44 +0100
From:	Simon Kagstrom <simon.kagstrom@...insight.net>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, krkumar2@...ibm.com
Subject: Re: [net-next PATCH] via-velocity: Enable scatter/gather IO by
 default

On Tue, 16 Feb 2010 16:20:15 -0800 (PST)
David Miller <davem@...emloft.net> wrote:

> > Reduces CPU utilization significantly with sendfile for example.
> > 
> > Signed-off-by: Simon Kagstrom <simon.kagstrom@...insight.net>
> 
> I think you need to have a look at this patch before making
> a change like this:
> 
> commit 83c98a8cd04dd0f848574370594886ba3bf56750
> Author: Dave Jones <davej@...hat.com>
> Date:   Tue Jul 21 09:15:49 2009 +0000
> 
>     Remove unused zero-copy code from velocity NIC driver.
>     
>     This code hasn't been enabled in forever.

Well I reenabled it here:

  http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=c79992fddee28bbd31b35ac297e1068d32930179

it was also cleaned up to remove all the #ifdefs around that code.

// Simon
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