From owner-freebsd-net@freebsd.org Thu May 10 13:48:05 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 5854FFCA048 for ; Thu, 10 May 2018 13:48:05 +0000 (UTC) (envelope-from thj@freebsd.org) Received: from out1-smtp.messagingengine.com (out1-smtp.messagingengine.com [66.111.4.25]) (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 E27E682565 for ; Thu, 10 May 2018 13:48:04 +0000 (UTC) (envelope-from thj@freebsd.org) Received: from compute2.internal (compute2.nyi.internal [10.202.2.42]) by mailout.nyi.internal (Postfix) with ESMTP id 4437922866; Thu, 10 May 2018 09:48:04 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute2.internal (MEProxy); Thu, 10 May 2018 09:48:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=6n46sg if222nHLqa3eUkTE0e3WT4XLA3mMm8TKO31YY=; b=Sx7O4/Ses6niY3sGi0Gh9F VHbuGraWxjY1K3p9LmnHHWbvYh0gARhAanSi6bZybt66U1VUZdT5Ne19L+Vct75D IgYVy8es+BeZ3uCj03xmvm9yA15HHVfAl/O/s5LLZw8UBxUSLv9+heSk1ucjHFfv 21PeFmdrizvF6TCpCFvCkMHb5csbMxgX+BJ1T0geM/weNzFwNf6mSaN+yHJL2LXF BQqHTda/FSgS7HPdX9c0k67lTBArTNCEAMcQsPtEiYFfEoyehRCJlXZfzGuGUqca 3iBaRZGWajfU/GgsUOpGe8J5tIERffqQsL5IKHTOP8eRbW0YqRd7HOh0K3uVIoTA == X-ME-Sender: Received: from tom-desk.erg.abdn.ac.uk (tom-desk.erg.abdn.ac.uk [139.133.204.4]) by mail.messagingengine.com (Postfix) with ESMTPA id 7447FE4393; Thu, 10 May 2018 09:48:03 -0400 (EDT) Date: Thu, 10 May 2018 14:47:46 +0100 From: Tom Jones To: Dries Michiels Cc: "freebsd-net@freebsd.org" Subject: Re: kernel: in6_delayed_cksum: delayed m_pullup Message-ID: <20180510134746.GD37534@tom-desk.erg.abdn.ac.uk> References: <5ae60f44.1c69fb81.ee4a5.1043@mx.google.com> <20180429190450.GA97911@tom-desk.erg.abdn.ac.uk> <5ae6cbc7.1c69fb81.ed649.655e@mx.google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <5ae6cbc7.1c69fb81.ed649.655e@mx.google.com> User-Agent: Mutt/1.9.4 (2018-02-28) 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 13:48:05 -0000 On Mon, Apr 30, 2018 at 09:54:48AM +0200, Dries Michiels wrote: > > Tom, > > I’m using the igb (intel I210) driver for my LAN interface and the em > (intel I219-V) driver for the WAN interface. I use this FreeBSD box > as my home server so I wouldn’t say that it has a heavy ipv6 workload. > Hi Dries, Does this bug persist on later snapshots? Or have you stayed with the same one from the original question? Could you send me the ifconfig flags lines for igb0 and em0? like this $ ifconfig em0 em0: flags=8943 metric 0 mtu 1500 options=40098 $ ifconfig igb0 igb0: flags=8843 metric 0 mtu 1500 options=6403bb My em interfaces don't have flags for ipv6 checksum offload, I suspect the issue is from the em side of your network. I have tried moving 100GB of v6 tcp through each interface with iperf3 to see if I could stimulate the bug, but no luck so far. I will leave the test box sitting exposed to my network for a while. - [tj]