From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Bareiro Subject: Re: Loss of network connectivity with high load Date: Wed, 16 Jun 2010 00:36:43 -0300 Message-ID: <20100616033643.GB28074@defiant.freesoftware> References: <20100615210038.GA28074@defiant.freesoftware> <201006151613.03906.iggy@theiggy.com> Reply-To: dbareiro@gmx.net Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="cvVnyQ+4j833TQvp" To: KVM General Return-path: Received: from mail.gmx.net ([213.165.64.20]:39579 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754379Ab0FPDgt (ORCPT ); Tue, 15 Jun 2010 23:36:49 -0400 Received: from defiant (defiant.freesoftware [10.1.0.65]) by hermes.freesoftware (Postfix) with ESMTP id 56C782F7 for ; Wed, 16 Jun 2010 00:35:17 -0300 (ART) Content-Disposition: inline In-Reply-To: <201006151613.03906.iggy@theiggy.com> Sender: kvm-owner@vger.kernel.org List-ID: --cvVnyQ+4j833TQvp Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi, Brian. On Tuesday, 15 June 2010 16:13:03 -0500, Brian Jackson wrote: > > I'm using Linux 2.6.31.13 compiled with the kernel.org source code > > on KVM host with Debian GNU/Linux Lenny amd64. Also I'm using Debian > > GNU/Linux Lenny amd64 virtual machine with kernel 2.6.26-2 from > > Debian repositories. I'm using qemu-kvm 0.12.3. > >=20 > > These are the parameters I'm using to start the virtual machine: > >=20 > >=20 > > escher:~# ps ax|grep kvm > > 6299 ? Rl 113:40 /usr/local/qemu-kvm/bin/qemu-system-x86_64 > > -drive file=3D/dev/vm/belvedere-raiz,cache=3Dnone,if=3Dvirtio,boot=3Don= -drive > > file=3D/dev/vm/belvedere-u01,cache=3Dnone,if=3Dvirtio -drive > > file=3D/dev/vm/belvedere-u02,cache=3Dnone,if=3Dvirtio -drive > > file=3D/dev/vm/belvedere-u03,cache=3Dnone,if=3Dvirtio -drive > > file=3D/dev/vm/belvedere-u04,cache=3Dnone,if=3Dvirtio -drive > > file=3D/dev/vm/belvedere-u05,cache=3Dnone,if=3Dvirtio -drive > > file=3D/dev/vm/belvedere-u06,cache=3Dnone,if=3Dvirtio -drive > > file=3D/dev/vm/belvedere-u07,cache=3Dnone,if=3Dvirtio -drive > > file=3D/dev/vm/belvedere-u08,cache=3Dnone,if=3Dvirtio -drive > > file=3D/dev/vm/belvedere-u09,cache=3Dnone,if=3Dvirtio -m 3072 -smp 2 -n= et > > nic,model=3Dvirtio,macaddr=3D00:16:3e:00:00:56 -net tap -daemonize -vnc= :2 > > -k es -localtime -monitor telnet:localhost:4002,server,nowait -serial > > telnet:localhost:4042,server,nowait > >=20 > >=20 > > When I try to copy directories of several gigabytes in this VM using > > rsync to other hosts, this virtual machine loses connectivity with > > the rest of the network. Checking, using a serial console > > connection, /var/log/syslog and /var/log/messages in search of the > > problem, I don't see information that might give a clue to the > > problem. > >=20 > > This problem is not with the network driver by default (rtl8139), so > > I think that should be something related to Virtio. > There have been a few bugs similar to this reported that should be > pretty easy to find. Basically, I'd say try 0.12.4, it should have a > few fixes in this area over 0.12.3. I was testing with qemu-kvm 0.12.4 but I'm having the same problem. I re-read the announce about qemu-kvm 0.12.4 sent by Avi, but I didn't find in it some reference about fixes related to Virtio. If there's anything else I can try, please tell me. Regards, Daniel --=20 Fingerprint: BFB3 08D6 B4D1 31B2 72B9 29CE 6696 BF1B 14E6 1D37 Powered by Debian GNU/Linux Lenny - Linux user #188.598 --cvVnyQ+4j833TQvp Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkwYRssACgkQZpa/GxTmHTftcwCdHuQGimCuEdJ52/e9Y/B/ZQF0 Wu0An2J1AHoqveaxnhyCDd1I/yzZd67O =2NsD -----END PGP SIGNATURE----- --cvVnyQ+4j833TQvp--