linux-kernel - Re: [patch 4/4] Configure out IGMP support

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Message-Id: <1217619715.3454.488.camel@pmac.infradead.org>
Date:	Fri, 01 Aug 2008 20:41:55 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc:	linux-kernel@...r.kernel.org, linux-embedded@...r.kernel.org,
	michael@...e-electrons.com, Matt Mackall <mpm@...enic.com>,
	netdev@...r.kernel.org, davem@...emloft.net,
	akpm@...ux-foundation.org
Subject: Re: [patch 4/4] Configure out IGMP support

On Thu, 2008-07-31 at 11:27 +0200, Thomas Petazzoni wrote:
> This patchs adds the CONFIG_IGMP option which allows to remove support
> for the Internet Group Management Protocol, used in
> multicast. Multicast is not necessarly used by applications,
> particularly on embedded devices. As this is a size-reduction option,
> it depends on CONFIG_EMBEDDED. It allows to save ~10 kilobytes of
> kernel code/data:

The config option probably lives in net/Kconfig, not init/Kconfig.

And please could you make it clear how this interacts with IP_MULTICAST?

We already have a CONFIG_IP_MULTICAST option, for which the help text
says "For more people, it's safe to say N'. And I think it defaults to
that too. What more does CONFIG_IGMP remove? It's not made clear by the
help text.

-- 
dwmw2

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