Hello! I’m failing to run a childhurd inside a ‘guix system vm’ GNU/Linux VM as of fc3a53525ab3dcaf7c22eec8d62294017f9760fe.
--8<---------------cut here---------------start------------->8--- Sep 17 17:03:25 localhost shepherd[1]: [qemu-system-i386] qemu-system-i386: Slirp: Failed to send packet, ret: -1 Sep 17 17:03:37 localhost shepherd[1]: [qemu-system-i386] qemu-system-i386: Slirp: Failed to send packet, ret: -1 Sep 17 17:03:43 localhost shepherd[1]: [qemu-system-i386] qemu-system-i386: Bad ram pointer 0x7f739ac0001e Sep 17 17:03:43 localhost shepherd[1]: secret service: invalid handshake #<eof> Sep 17 17:03:43 localhost shepherd[1]: Service hurd-vm could not be started. Sep 17 17:03:43 localhost shepherd[1]: Service hurd-vm failed to start. --8<---------------cut here---------------end--------------->8--- When I run it by hand with KVM on my bare-metal GNU/Linux machine, it’s all good: 👍 --8<---------------cut here---------------start------------->8--- $ "/gnu/store/1rg1fb9mj65rh82467vwlrkmi12p4v89-qemu-minimal-8.1.0/bin/qemu-system-i386" "-m" 2048 "--device" "rtl8139,netdev=net0" "--netdev" "user,id=net0,hostfwd=tcp:127.0.0.1:11004-:1004,hostfwd=tcp:127.0.0.1:10022-:2222,hostfwd=tcp:127.0.0.1:15900-:5900" "--snapshot" "--hda" "/gnu/store/iqacww23byvw9c5ssja9fkx6m4s057b0-disk-image" "--no-reboot" --enable-kvm VNC server running on 127.0.0.1:5900 --8<---------------cut here---------------end--------------->8--- However, the same thing *without* KVM (as happens within ‘guix system vm’) reproduces the “Bad ram pointer” issue: --8<---------------cut here---------------start------------->8--- $ "/gnu/store/1rg1fb9mj65rh82467vwlrkmi12p4v89-qemu-minimal-8.1.0/bin/qemu-system-i386" "-m" 2048 "--device" "rtl8139,netdev=net0" "--netdev" "user,id=net0,hostfwd=tcp:127.0.0.1:11004-:1004,hostfwd=tcp:127.0.0.1:10022-:2222,hostfwd=tcp:127.0.0.1:15900-:5900" "--snapshot" "--hda" "/gnu/store/iqacww23byvw9c5ssja9fkx6m4s057b0-disk-image" "--no-reboot" VNC server running on 127.0.0.1:5900 qemu-system-i386: Bad ram pointer 0x7fa930e0001e Aborted --8<---------------cut here---------------end--------------->8--- Good news: I found a workaround! Just use the x86_64 emulator: --8<---------------cut here---------------start------------->8--- $ "/gnu/store/1rg1fb9mj65rh82467vwlrkmi12p4v89-qemu-minimal-8.1.0/bin/qemu-system-x86_64" "-m" 2048 "--device" "rtl8139,netdev=net0" "--netdev" "user,id=net0,hostfwd=tcp:127.0.0.1:11004-:1004,hostfwd=tcp:127.0.0.1:10022-:2222,hostfwd=tcp:127.0.0.1:15900-:5900" "--snapshot" "--hda" "/gnu/store/iqacww23byvw9c5ssja9fkx6m4s057b0-disk-image" "--no-reboot" VNC server running on 127.0.0.1:5900 --8<---------------cut here---------------end--------------->8--- Obviously, I have no clue why that works, but who cares, right? :-) Thoughts? Ludo’.
