From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steven Haigh 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: Wed, 07 May 2014 04:07:24 +1000 Message-ID: <536924DC.9080606@crc.id.au> 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> <53691848.5010809@citrix.com> <437888929.20140506193723@eikelenboom.it> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="rECvAExJHckBTE8iSWVKnPqBTBtTOOQeL" Cc: Ian Campbell , Eric Dumazet , netdev@vger.kernel.org, xen-devel@lists.xen.org, "David S. Miller" , Konrad Rzeszutek Wilk To: Sander Eikelenboom , Zoltan Kiss Return-path: Received: from mail.crc.id.au ([203.56.246.92]:59993 "EHLO mail.crc.id.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750751AbaEFSGz (ORCPT ); Tue, 6 May 2014 14:06:55 -0400 In-Reply-To: <437888929.20140506193723@eikelenboom.it> Sender: netdev-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --rECvAExJHckBTE8iSWVKnPqBTBtTOOQeL Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 07/05/14 03:37, Sander Eikelenboom wrote: >=20 > Tuesday, May 6, 2014, 7:13:44 PM, you wrote: >=20 >> 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 >=20 >> Can you also see packet corruption? You can find a testfile generator = in=20 >> Sander's mail, downloading from an Apache server with wget seems to be= OK. >=20 > The corruption shouldn't be there since he is running 3.14.2 which is f= ine. >=20 > And note that the corruption with 3.15 only seems to occur in traffic b= etween=20 > guests and not between dom0 and guest. The bit torrent traffic is prob= ably=20 > inet <-> dom0 <-> guest, so shouldn't be affected, even with 3.15. Well, I'm trying to get a test together - although I don't have webdav anywhere... I was going to try it via FTP, however I'm hitting another MMU bug in Xen: https://bugs.archlinux.org/task/38596 This references: https://lkml.org/lkml/2014/1/23/596 It says that should be fixed in 3.15-rc3 (if I understand properly) - but I'm also hitting that on 3.14.2. Did these changes get ported back to the 3.14 tree? (also adding in Konrad vs the vsftp issue in Xen PV DomUs). --=20 Steven Haigh Email: netwiz@crc.id.au Web: http://www.crc.id.au Phone: (03) 9001 6090 - 0412 935 897 Fax: (03) 8338 0299 --rECvAExJHckBTE8iSWVKnPqBTBtTOOQeL Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAEBAgAGBQJTaSTcAAoJEEGvNdV6fTHcL/IP/1R4imeROLycGhDI3EVN3rqA LNVEVDJDB29w4Ivs8N1YSUAw7Gh/LCEeNJtbY8MPxlA+VhcXj+j+3DCp95KIeYiV 9HuYgogzNG/mQo6ntLyJAOaeLeLrd6oqwOj9zs7fIXovaeJ5IDgGag6p7UkhQfdZ MEAXI7Lpud5xnHu+I+ac2mvpPf3sNnK4H4OPfQic6eU8H5BIcwWj3OTNa4rLcu9N K4iO5R5xQ8Ke4hqZyGXS5eiS4fbqEGIaCwIgPhsrjCba1Hl2ORN1V/Ft9c2yX/Gl QRloPFCQJEQOiGnJpTnbt17pQzPglJreKueMBwKywCbwNl+lnF2nejCL/O15pitH FK+eY/bOyMbgQV0nWOgKQ3axoRJatLdcK0UhlHSy7LZpIIB1cOdkEzv+yyw9AmQj bzGsaRNVch+wYRyFr51MraUTYg1EyWC+RJHcilJy5ToSTvTTdHk74Z/OojQU1DR4 CXujqRqal4uR2xliObfOIF2Kiugxx+dqlD/NZWpjhCawEeI8tCws65n1eYagk9mo 0dhJILvm1qIcmxu7+zEK7LM5MAtsTpdx3DCkp1OituTQwhaAUmLKsIGvsCsumHbt zlGe6qaoKN+/YzDlFcsm5SrCJB/dHg/0lymb7wEs9vVe67UUDEC7I/wNd+3FOh+B qgNrjDcr/M1v/dijjZUh =rGf0 -----END PGP SIGNATURE----- --rECvAExJHckBTE8iSWVKnPqBTBtTOOQeL--