Hi, I'm having a problem with a fedora15 x86_64 host with a fedora15 x86_64 guest on a Xeon E3-1240 with 8GB RAM on the guest. This is the only guest. The server is configured as a mail server, using spamassassin, postfix, amavisd, and clamav. It was previously running without error on different hardware. I migrated the disks to a more powerful server due to load. It's a new server, and has been stress tested with memtest86, mprime, and passmark's Linux test for more than 24 hours without producing a problem. However, when I run the kvm vm, I receive a bunch of errors similar to these on the guest: [169245.360511] clamscan[27448] general protection ip:7f125f2e6ffb sp:7fff117566f0 error:0 in libclamav.so.6.1.11[7f125f229000+9ce000] [29016.445470] clamd[1110] general protection ip:30df2c3981 sp:7fffa08f4fe0 error:0 in libclamav.so.6.1 .11[30df200000+9ce000] There are other applications, such as pyzor, that produce similar errors. Is this something that could be a result of some software configuration error I've made? Is there something I can do to debug this further? There also aren't any errors on the host indicating a kernel problem or hardware issue. Is it possible this is a known error? I was previously trying to improve IO performance by using 'block' instead of 'file' for the device, but had to abandon that idea because it didn't work and I had to concentrate on this problem. Could disabling the cache (cache=none) cause this? I've included some info below, in hopes someone could guide me towards a solution. # rpm -qva|egrep 'kvm|libvirt|kernel|qemu' libvirt-python-0.8.8-7.fc15.x86_64 kernel-2.6.40.6-0.fc15.x86_64 qemu-img-0.14.0-8.fc15.x86_64 gpxe-roms-qemu-1.0.1-4.fc15.noarch kernel-2.6.40.4-5.fc15.x86_64 qemu-system-x86-0.14.0-8.fc15.x86_64 libvirt-0.8.8-7.fc15.x86_64 libvirt-client-0.8.8-7.fc15.x86_64 qemu-common-0.14.0-8.fc15.x86_64 kernel-headers-2.6.40.6-0.fc15.x86_64 qemu-kvm-0.14.0-8.fc15.x86_64 I've included my domain config below in hopes it helps. <domain type='kvm'> <name>mail02</name> <uuid>ec4f3cf5-2f27-fb3e-72f6-3fa3176b13b6</uuid> <memory>6291456</memory> <currentMemory>6291456</currentMemory> <vcpu>4</vcpu> <os> <type arch='x86_64' machine='pc-0.14'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/var/lib/libvirt/images/mail02.img'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:67:2c:4c'/> <source bridge='br0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </memballoon> </devices> </domain> Thanks, Alex