It is much slower than user mode emulation since the target kernel is emulated, as well as device input/output, interrupts etc. This QEMU mode emulates a virtual machine with a configurable CPU, video card, memory size and mode. In summary, user mode emulation is a nice mode when it works and should be preferred when speed matters, but full system emulation mode should be used for a more complete emulation. One may combine syscall emulation with some tools like pbuilder or sbuild read on for specific instructions for each tool. This chroot should behave mostly like a regular chroot, with the associated drawbacks (no isolation as in virtual machines) and the limitations of qemu syscall emulation. Such a chroot can be created with the qemu-debootstrap command (from the qemu-kvm-extras-static package) which behaves like debootstrap, but copies a static qemu interpreter in the chroot as well. % sudo cp /usr/bin/qemu-arm-static usr/bin/qemu-arm- staticīin dev home lost+ found mnt proc sbin srv tmp varīoot etc lib media opt root selinux sys usr
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