From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zoltan Kiss Subject: Re: [3.15-rc3] Bisected: xen-netback mangles packets between two guests on a bridge since merge of "TX grant mapping with SKBTX_DEV_ZEROCOPY instead of copy" series. Date: Tue, 6 May 2014 18:13:44 +0100 Message-ID: <53691848.5010809@citrix.com> References: <395225650.20140430124506@eikelenboom.it> <536162D3.5080307@citrix.com> <94755525.20140501002553@eikelenboom.it> <53624E25.8040404@citrix.com> <1810270947.20140501155911@eikelenboom.it> <53626C39.3030304@citrix.com> <928229683.20140501193936@eikelenboom.it> <198418193.20140501213951@eikelenboom.it> <5363A508.1000602@citrix.com> <653156457.20140502160632@eikelenboom.it> <5363AFED.5080601@citrix.com> <1399044073.29914.237.camel@edumazet-glaptop2.roam.corp.google.com> <5363B929.1000502@citrix.com> <35970097.20140502182818@eikelenboom.it> <5363CBB0.6050804@citrix.com> <15602339.20140505121912@eikelenboom.it> <536916E9.7010509@crc.id.au> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Cc: , "David S. Miller" , Ian Campbell , Eric Dumazet , To: Steven Haigh , Sander Eikelenboom Return-path: Received: from smtp.citrix.com ([66.165.176.89]:25896 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750748AbaEFRNr (ORCPT ); Tue, 6 May 2014 13:13:47 -0400 In-Reply-To: <536916E9.7010509@crc.id.au> Sender: netdev-owner@vger.kernel.org List-ID: On 06/05/14 18:07, Steven Haigh wrote: > On a related note, I'm seeing this on an Arch Linux DomU and kernel > 3.14.2. Its running aria2c bit torrent client. > > The Dom0 is EL6 with Xen 4.2.4 / 3.14.2 kernel. > > I also lodged this on the Arch bug tracker: > https://bugs.archlinux.org/task/40244 > > In a nutshell, I see: > [ 7432.398096] xen_netfront: xennet: skb rides the rocket: 19 slots > [ 7434.270870] xen_netfront: xennet: skb rides the rocket: 19 slots > [ 7434.782199] xen_netfront: xennet: skb rides the rocket: 19 slots > [ 7435.184794] xen_netfront: xennet: skb rides the rocket: 19 slots > [ 7437.530677] xen_netfront: xennet: skb rides the rocket: 19 slots > [ 7437.973905] xen_netfront: xennet: skb rides the rocket: 19 slots > [ 7438.383947] xen_netfront: xennet: skb rides the rocket: 19 slots Can you also see packet corruption? You can find a testfile generator in Sander's mail, downloading from an Apache server with wget seems to be OK. Zoli