I can't add much, except that I started noticing his issue when migrating my VMs to an Ubuntu Precise server hypervisor where under (heavy?) load my Win 2008 Server VM started to crash very frequently with the error showing up in the libvirt log of the VM.
It might be useful information that I ended up moving the VM back to a Debian Squeeze hypervisor which hosted it originally and things were running smoothly until earlier today when a crash with the same message happened again. What's sure is that under Squeeze the issue is far-far less frequent, on Precise the VM got reset a dozen times during the first 48 h, while on Squeeze it's been running fine even under heavy load for weeks without a hiccup. Details of the Precise hypervisor: kvm: 1:84+dfsg-0ubuntu16+1.0+noroms+0ubuntu14.3 qemu-kvm: 1.0+noroms-0ubuntu14.3 kernel: 3.2.0-32-generic (tested with virtio drivers virtio-win-0.1-15.iso and virtio-win-0.1-30.iso) Details of the Squeeze hypervisor: kvm: 1:0.12.5+dfsg-5+squeeze8 qemu-kvm: 0.12.5+dfsg-5+squeeze8 kernel: 2.6.32-5-amd64 (tested with virtio drivers virtio-win-0.1-15.iso) -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/990364 Title: virtio_ioport_write: unexpected address 0x13 value 0x1 Status in QEMU: New Bug description: Hello! I have: virtio_ioport_write: unexpected address 0x13 value 0x1 on config: LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M pc-0.12 -cpu qemu32 -enable-kvm -m 3072 -smp 1 -name nata_xp -uuid da607499-1d8f-e7ef-d1d2-38 1c1839e4ba -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/nata_xp.monitor,server,nowait -monitor chardev:monitor -localtime -boot c -drive file=/root/nata_xp.qcow2,if=virtio,index=0,boot=on,format=raw ,cache=none -drive file=/home/admino/virtio-win-0.1-22.iso,if=ide,media=cdrom,index=2,format=raw -net nic,macaddr=00:16:36:06:02:69,vlan=0,model=virtio,name=virtio.0 -net tap,fd=43,vlan=0,name=tap.0 -serial none -parallel none -usb -usbdevice tablet -vnc 127.0.0.1:3 -k en-us -vga cirrus pci_add_option_rom: failed to find romfile "pxe-virtio.bin" with kernel 2.6.32-40-generic #87-Ubuntu SMP Tue Mar 6 00:56:56 UTC 2012 x86_64 GNU/Linux qemu drivers are virtio-win-0.1-22.iso kvm version 1:84+dfsg-0ubuntu16+0.12.3+noroms+0ubuntu9.18 qemu 0.12.3+noroms-0ubuntu9.18 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/990364/+subscriptions
