Hello, With kernel 3.4.0 as a dom0 and a 3.3.6 as a domU, i get the following oops on the dom0 kernel when I rsync / to a filesystem mounted on a loop device: http://77.36.72.222/P5230845.JPG The domU config: ierdnac-hp ~ # cat /mnt/gentoo/xen kernel = "/boot/vmlinuz-3.3.6-pf-c241.old" name="gentoo" memory = 2048 vcpus = 1 pae = 1 acpi = 1 apic = 1 stdvga=0 serial=''pty'' usbdevice=''tablet'' on_poweroff = ''destroy'' on_reboot = ''restart'' on_crash = ''restart'' vnc=1 vncviewer=1 vncconsole=1 sdl=0 vfb = [ ''type=vnc'' ] disk = [''file:/mnt/gentoo/ierdnac-hp.bak,sdd1,w''] root = "root=/dev/xvdd1 ro" If you are interested in the kernels .config file I can provide them.