From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Bareiro Subject: Loss of network connectivity with high load Date: Tue, 15 Jun 2010 18:00:38 -0300 Message-ID: <20100615210038.GA28074@defiant.freesoftware> Reply-To: dbareiro@gmx.net Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="mP3DRpeJDSE+ciuQ" To: KVM General Return-path: Received: from mail.gmx.net ([213.165.64.20]:45582 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754552Ab0FOVBO (ORCPT ); Tue, 15 Jun 2010 17:01:14 -0400 Received: from defiant (defiant.freesoftware [10.1.0.65]) by hermes.freesoftware (Postfix) with ESMTP id 74C0B471 for ; Tue, 15 Jun 2010 17:59:12 -0300 (ART) Content-Disposition: inline Sender: kvm-owner@vger.kernel.org List-ID: --mP3DRpeJDSE+ciuQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi all! 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. These are the parameters I'm using to start the virtual machine: 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 -dr= ive 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 -net 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 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. This problem is not with the network driver by default (rtl8139), so I think that should be something related to Virtio. Thanks in advance for your reply. Regards, Daniel --=20 Fingerprint: BFB3 08D6 B4D1 31B2 72B9 29CE 6696 BF1B 14E6 1D37 Powered by Debian GNU/Linux Lenny - Linux user #188.598 --mP3DRpeJDSE+ciuQ 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) iEYEARECAAYFAkwX6fYACgkQZpa/GxTmHTduHACfeXYic/exnQdCyJvdnV43BJM8 PY0An1PxY5OH8xomKhiE/05GAhwsjUQE =Jsbo -----END PGP SIGNATURE----- --mP3DRpeJDSE+ciuQ--