From owner-freebsd-net@freebsd.org Thu May 10 15:08:37 2018 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 341C4FCCC95 for ; Thu, 10 May 2018 15:08:37 +0000 (UTC) (envelope-from alex@zagrebin.ru) Received: from mail.zagrebin.ru (srv0.zagrebin.ru [IPv6:2001:470:1f15:30e::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id A7CB66D8E4 for ; Thu, 10 May 2018 15:08:36 +0000 (UTC) (envelope-from alex@zagrebin.ru) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=zagrebin.ru ; s=mail; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Subject:To:From:Date:Sender:Reply-To:Cc:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=xHY0ELVzK5x0HvQP2H1AgFwUpNDwe1ATS9pYQRfeAEE=; b=aGOvkx4Y+zUqMrszb8yC6ZipZP aPv07CqV4F3dmRcCd8SE9XJPLMPzmApfEHHM76vPXnuapx2RrDFFWSugmmwerHuZDoedeizAYAQQx auqS4Ow4itC3PLe28rA3PJjqh2l3iK4CaYmJtzJ0NCR1SOGyQGT/1Va93XmjXniDtlJDT8dmdbcbk 1M01lNyWbuVY3PQlLfO7YEpxjWmWzfzbhPa3N8m74Jzo6YfHaBB10/aFvASQUtPkL6Q8+Eq+fSVrN lpkFe/NTHOb+eFgdHAa7GDXGG+f5uw+t1CYvLiEeE7k6UvLeE7dk+xIMvzOP+bDxq28oPLnVVC70a xkQgzgEA==; Received: from [2001:470:1f15:30e::2] (helo=vm2.home.zagrebin.ru) by mail.zagrebin.ru with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91 (FreeBSD)) (envelope-from ) id 1fGnBK-0004Cl-0O for freebsd-net@freebsd.org; Thu, 10 May 2018 18:08:34 +0300 Date: Thu, 10 May 2018 18:08:26 +0300 From: Alexander Zagrebin To: freebsd-net@freebsd.org Subject: Re: kernel: in6_delayed_cksum: delayed m_pullup Message-ID: <20180510180826.7bb1d861@vm2.home.zagrebin.ru> In-Reply-To: <007101d3e86f$196e4fb0$4c4aef10$@gmail.com> References: <5ae60f44.1c69fb81.ee4a5.1043@mx.google.com> <20180429190450.GA97911@tom-desk.erg.abdn.ac.uk> <5ae6cbc7.1c69fb81.ed649.655e@mx.google.com> <20180510134746.GD37534@tom-desk.erg.abdn.ac.uk> <007101d3e86f$196e4fb0$4c4aef10$@gmail.com> X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; amd64-portbld-freebsd11.1) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 May 2018 15:08:37 -0000 В Thu, 10 May 2018 16:56:38 +0200 "Dries Michiels" пишет: > I had updated the day after to see if it was just a regression but > the error message was not gone: May 1 22:19:51 vados kernel: > in6_delayed_cksum: delayed m_pullup, m->len: 48 plen 68 off 56 > csum_flags=400 May 1 22:27:57 vados last message > repeated 29 times May 1 22:36:53 vados last message repeated 17 > times May 1 22:49:41 vados last message repeated 6 times May 1 > 23:00:09 vados last message repeated 8 times May 1 23:01:06 vados > last message repeated 7 times May 1 23:18:05 vados last message > repeated 12 times For this reason I had disabled IPV6 for my LAN > clients (disabled rtadvd). My server was still ipv6 reachable and > error messages where gone. I've observed such messages when ipv6 packets was passed via ipv4 NAT. After changing ipfw rule from (for example) nat 1 ip from any to me in via re1 to nat 1 ipv4 from any to me in via re1 this messages has gone. -- Alexander Zagrebin