Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933096Ab2FHP4V (ORCPT ); Fri, 8 Jun 2012 11:56:21 -0400 Received: from hosting.visp.net.lb ([194.146.153.11]:47558 "EHLO hosting.visp.net.lb" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932388Ab2FHP4T (ORCPT ); Fri, 8 Jun 2012 11:56:19 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Date: Fri, 08 Jun 2012 18:56:12 +0300 From: Denys Fedoryshchenko To: Benjamin LaHaise Cc: Eric Dumazet , Francois Romieu , , , Subject: Re: Deadlock, L2TP over IP are not working, 3.4.1 In-Reply-To: <20120608154106.GD5024@kvack.org> References: <7ed49f446365ac625437702d92946add@visp.net.lb> <20120607205356.GA2491@electric-eye.fr.zoreil.com> <1339104606.6001.4.camel@edumazet-glaptop> <20120607223752.GA4475@electric-eye.fr.zoreil.com> <1339134438.6001.13.camel@edumazet-glaptop> <20120608154106.GD5024@kvack.org> Message-ID: <67d8beaf421874815145fdefc69b3366@visp.net.lb> User-Agent: VISP Webmail/0.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1260 Lines: 32 On 2012-06-08 18:41, Benjamin LaHaise wrote: > On Fri, Jun 08, 2012 at 07:47:18AM +0200, Eric Dumazet wrote: >> I have no idea how many l2tp_eth devices are setup at once in >> typical >> conf. > > Depends on the usage scenario. L2TP is commonly used for terminating > customer connections by wholesale ISPs. In that kind of edge routing > use-case, tens of thousands of interfaces are easily possible. > > -ben In my case it is few hundreds. I am not sure it is typical case, but i really will like if this setup will give me good performance. Since Linux usually used on the PC's, i don't think they will scale more than 2-3 Gbps. Also L2TP pseudowire (l2tp_eth) usually done not directly to end-users, but to LAC's, so i think it is up to thousand. Right now i am routing around 700Mbps over there, and noticed some problem with pskb_expand_head, but that's separate question i will ask, if i will not be able to sort it out by myself. --- Denys Fedoryshchenko, Network Engineer, Virtual ISP S.A.L. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/