vnc: 0.104 KVM: 0.101 other: 0.090 boot: 0.087 device: 0.072 permissions: 0.071 debug: 0.062 performance: 0.062 network: 0.062 semantic: 0.060 PID: 0.060 graphic: 0.058 socket: 0.058 files: 0.053 KVM: 0.409 debug: 0.398 network: 0.113 PID: 0.026 socket: 0.010 files: 0.009 vnc: 0.008 boot: 0.007 device: 0.007 other: 0.005 performance: 0.003 semantic: 0.003 graphic: 0.002 permissions: 0.001 qemu-kvm-0.14.0 + kernel 2.6.35 : win2008r2 virtio nic hanging Hi, I'm a proxmox distrib user, I have network error with virtio nic cards in win2008r2sp1 server, only with qemu 0.14 and 2.6.35 kernel combination. after some network transferts (can be 2mb or 500mb), nic doesn't respond anymore. only way is to reboot. e1000 driver working fine. revert back to qemu 0.13+ 2.6.35 kernel works fine or qemu 0.14 + 2.6.32 kernel is working fine too. i'm using virtio nic drivers 1.1.16 from http://alt.fedoraproject.org/pub/alt/virtio-win/latest/images/bin/ i had also tried the virtio-win-prewhql-0.1-7-nic.tar.gz from https://bugzilla.redhat.com/show_bug.cgi?id=630830#c26 i'm not the only proxmox user ,more users reports here : http://forum.proxmox.com/threads/6194-Troubles-with-latest-virtio-drivers-for-Windows-and-latest-PVE-1.8 i've also see that a slackware user with winxp guest has the same problem http://www.spinics.net/lists/kvm/msg51089.html I can help to debug if it's possible to have logs somewhere ..... Forget to say: i'm using a quad-amd opteron 6172 (12cores) server, 256gb ram. kvm guest launch command: /usr/bin/kvm -monitor unix:/var/run/qemu-server/124.mon,server,nowait -vnc unix:/var/run/qemu-server/124.vnc,password -pidfile /var/run/qemu-server/124.pid -daemonize -usbdevice tablet -name testmachine -smp sockets=1,cores=12 -nodefaults -boot menu=on -tdf -localtime -rtc-td-hack -k fr -vga std -device lsi,id=scsi0,bus=pci.0,addr=0x5 -device lsi,id=scsi1,bus=pci.0,addr=0x6 -drive file=/dev/cdrom,if=none,id=drive-ide2,media=cdrom -device ide-drive,bus=ide.1,unit=0,drive=drive-ide2,id=disk-ide2 -drive file=/dev/disk/by-id/scsi-3600144f0f62f0e0000004d64fcaf000f,if=none,id=drive-virtio0,cache=none,boot=on -device virtio-blk-pci,drive=drive-virtio0,id=disk-virtio0,bus=pci.0,addr=0x7 -drive file=/dev/disk/by-id/scsi-3600144f0f62f0e0000004d6614f00012,if=none,id=drive-virtio1,cache=none -device virtio-blk-pci,drive=drive-virtio1,id=disk-virtio1,bus=pci.0,addr=0x8 -m 4000 -netdev type=tap,id=netdev2,ifname=tap124i101d2,script=/var/lib/qemu-server/bridge-vlan,vhost=on -device virtio-net-pci,mac=76:33:01:8E:91:B8,netdev=netdev2,id=nic2,bus=pci.0,addr=0x18 -netdev type=tap,id=netdev1,ifname=tap124i31d1,script=/var/lib/qemu-server/bridge-vlan,vhost=on -device virtio-net-pci,mac=02:A5:80:68:5E:EA,netdev=netdev1,id=nic1,bus=pci.0,addr=0x17 Triaging old bug tickets ... can you still reproduce this problem with the latest version of QEMU and the latest version of the virtio-net drivers? [Expired for QEMU because there has been no activity for 60 days.]