From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <shemminger@vyatta.com>
Subject: Re: [PATCH net-next] bridge: implement multicast fast leave
Date: Mon, 3 Dec 2012 07:53:16 -0800
Message-ID: <20121203075316.0b1da39d@nehalam.linuxnetplumber.net>
References: <1354545363-11953-1-git-send-email-amwang@redhat.com>
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Cc: netdev@vger.kernel.org, bridge@lists.linux-foundation.org,
	"David S. Miller" <davem@davemloft.net>,
	Herbert Xu <herbert@gondor.hengli.com.au>
To: Cong Wang <amwang@redhat.com>
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On Mon,  3 Dec 2012 22:36:03 +0800
Cong Wang <amwang@redhat.com> wrote:

> Fast leave allows bridge to immediately stops the multicast
> traffic on the port receives IGMP Leave when IGMP snooping is enabled,
> no timeouts are observed.
> 
> Cc: Herbert Xu <herbert@gondor.apana.org.au>
> Cc: Stephen Hemminger <shemminger@vyatta.com>
> Cc: "David S. Miller" <davem@davemloft.net>
> Signed-off-by: Cong Wang <amwang@redhat.com>

I like the feature, and it looks like an oversight in the initial design.
Why is this not the default, adding more options obscures it.