netdev - Re: [PATCH net-next 1/3] tuntap: allow changing ethtool speed (v2)

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Message-ID: <1374709250.1732.40.camel@bwh-desktop.uk.level5networks.com>
Date:	Thu, 25 Jul 2013 00:40:50 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Stephen Hemminger <stephen@...workplumber.org>
CC:	Helmut Grohne <h.grohne@...nusnetworks.de>,
	David Miller <davem@...emloft.net>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 1/3] tuntap: allow changing ethtool speed (v2)

On Wed, 2013-07-24 at 16:11 -0700, Stephen Hemminger wrote:
> The data reported by the ethtool interface for tun/tap devices is
> artificial. The default speed is 10Mbit. Virtual interfaces are often
> faster than this nowadays, so the observed bandwidth may exceed the
> available bandwidth. This patch allows an administrator to change the
> available bandwidth as reported by ethtool.
> 
> Signed-off-by: Helmut Grohne <h.grohne@...nusnetworks.de>
> Signed-off-by: Stephen Hemminger <stephen@...workplumber.org>
> 
> ---
> v2 - allow setting duplex as well, fix patch formatting

It's logically full duplex so this doesn't make sense to me.

>      ignore other settings in set
[...]

No, please never do that in ethtool_ops::set_settings.  Setting
unsupported values is an error.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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