From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753180AbaBXXEc (ORCPT ); Mon, 24 Feb 2014 18:04:32 -0500 Received: from shards.monkeyblade.net ([149.20.54.216]:48130 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753098AbaBXXEa (ORCPT ); Mon, 24 Feb 2014 18:04:30 -0500 Date: Mon, 24 Feb 2014 18:04:26 -0500 (EST) Message-Id: <20140224.180426.411052665068255886.davem@davemloft.net> To: dcbw@redhat.com Cc: mcgrof@do-not-panic.com, zoltan.kiss@citrix.com, netdev@vger.kernel.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, kuznet@ms2.inr.ac.ru, jmorris@namei.org, yoshfuji@linux-ipv6.org, kaber@trash.net Subject: Re: [RFC v2 2/4] net: enables interface option to skip IP From: David Miller In-Reply-To: <1393266120.8041.19.camel@dcbw.local> References: <1392857777.22693.14.camel@dcbw.local> <1393266120.8041.19.camel@dcbw.local> X-Mailer: Mew version 6.5 on Emacs 24.3 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.7 (shards.monkeyblade.net [149.20.54.216]); Mon, 24 Feb 2014 15:04:29 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dan Williams Date: Mon, 24 Feb 2014 12:22:00 -0600 > In the future I expect more people will want to disable IPv4 as > they move to IPv6. I definitely don't. I've been lightly following this conversation and I have to say a few things. disable_ipv6 was added because people wanted to make sure their machines didn't generate any ipv6 traffic because "ipv6 is not mature", "we don't have our firewalls configured to handle that kind of traffic" etc. None of these things apply to ipv4. And if you think people will go to ipv6 only, you are dreaming. Name a provider of a major web sitewho will go to strictly only providing an ipv6 facing site? Only an idiot who wanted to lose significiant nunbers of page views and traffic would do that, so ipv4 based connectivity will be universally necessary forever. I think disable_ipv4 is absolutely a non-starter.