Marius Bakke writes: Hello, > Mathieu Othacehe writes: > >> So, I don't get why would we need to run a Hurd VM inside a VM. I've >> been struggling a lot with running nested layers of virtualization (for >> system generation before the recent patches), and the result is often >> too slow to be really usable. > > Note that recent processors support nested layers of virtualization > natively with little overhead, but it's disabled by default. Ah! > For an Intel processor, it can be enabled by adding this to your system > configuration: > > (kernel-arguments (cons "kvm_intel.nested=1" %default-kernel-arguments)) Is there an obvious downside to enabling this? Great...So on the host I did --8<---------------cut here---------------start------------->8--- root@dundal ~# rmmod kvm_intel root@dundal ~# modprobe kvm_intel kvm_intel.nested=1 root@dundal ~# cat /sys/module/kvm_intel/parameters/nested Y --8<---------------cut here---------------end--------------->8--- and the interwebs told me that to start the VM, you have to add "-cpu host"; so I started it using --8<---------------cut here---------------start------------->8--- /gnu/store/k2b7nx34cwyi6yk49wgy4hg9mrwcmll5-run-vm.sh -cpu host -m 2G -device rtl8139,netdev=net0 -netdev user,id=net0,hostfwd=tcp:127.0.0.1:10022-:2222,hostfwd=tcp:127.0.0.1:25900-:25900 --8<---------------cut here---------------end--------------->8--- and trying to "ssh -p 20022 localhost" from inside the bare-bones VM now prints --8<---------------cut here---------------start------------->8--- qemu-system-i386: Slirp: Failed to send package, ret: -1 qemu-system-i386: Slirp: Failed to send package, ret: -1 qemu-system-i386: Slirp: Failed to send package, ret: -1 qemu-system-i386: Slirp: Failed to send package, ret: -1 qemu-system-i386: Slirp: Failed to send package, ret: -1 qemu-system-i386: Slirp: Failed to send package, ret: -1 key_exchange_identification: read: Connection reset by peer Connection reset by 127.0.0.1 port 20022 --8<---------------cut here---------------end--------------->8--- ...something networky with QEMU. Ideas? Janneke -- Jan Nieuwenhuizen | GNU LilyPond http://lilypond.org Freelance IT http://JoyofSource.com | AvatarĀ® http://AvatarAcademy.com