From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Edgar E. Iglesias" Subject: Re: UDP path MTU discovery Date: Wed, 31 Mar 2010 00:04:51 +0200 Message-ID: <20100330220450.GA14304@laped.iglesias.mooo.com> References: <20100329201431.GH20695@one.firstfloor.org> <20100329205035.GA32656@laped.iglesias.mooo.com> <4BB11510.9000302@hp.com> <1269898152.1958.86.camel@edumazet-laptop> <20100330052044.GJ20695@one.firstfloor.org> <20100330061627.GA22436@laped.iglesias.mooo.com> <20100330061952.GO20695@one.firstfloor.org> <20100330082013.GA18300@edde.se.axis.com> <20100330141237.GP20695@one.firstfloor.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "Templin, Fred L" , Eric Dumazet , Rick Jones , Glen Turner , "netdev@vger.kernel.org" To: Andi Kleen Return-path: Received: from mail-ew0-f220.google.com ([209.85.219.220]:55952 "EHLO mail-ew0-f220.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753883Ab0C3WE5 (ORCPT ); Tue, 30 Mar 2010 18:04:57 -0400 Received: by ewy20 with SMTP id 20so1701345ewy.1 for ; Tue, 30 Mar 2010 15:04:56 -0700 (PDT) Content-Disposition: inline In-Reply-To: <20100330141237.GP20695@one.firstfloor.org> Sender: netdev-owner@vger.kernel.org List-ID: On Tue, Mar 30, 2010 at 04:12:37PM +0200, Andi Kleen wrote: > > Where does the application controllable per socket MTU come into the > > picture? > > To set the minimum path MTU so that there is a guarantee that IPv6 routers > (which are unable to fragment themselves) will never drop it. Not sure I agree with that kind of solution but thats probably because of missunderstandings on my side :) Thanks for explaning.