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* bug#66053: Childhurd fails to run inside ‘guix system vm’
@ 2023-09-17 15:21 Ludovic Courtès
  2023-09-18 21:44 ` Ludovic Courtès
  0 siblings, 1 reply; 2+ messages in thread
From: Ludovic Courtès @ 2023-09-17 15:21 UTC (permalink / raw)
  To: 66053; +Cc: Janneke Nieuwenhuizen

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’.




^ permalink raw reply	[flat|nested] 2+ messages in thread

* bug#66053: Childhurd fails to run inside ‘guix system vm’
  2023-09-17 15:21 bug#66053: Childhurd fails to run inside ‘guix system vm’ Ludovic Courtès
@ 2023-09-18 21:44 ` Ludovic Courtès
  0 siblings, 0 replies; 2+ messages in thread
From: Ludovic Courtès @ 2023-09-18 21:44 UTC (permalink / raw)
  To: 66053-done; +Cc: Janneke Nieuwenhuizen

Ludovic Courtès <ludovic.courtes@inria.fr> skribis:

> When I run it by hand with KVM on my bare-metal GNU/Linux machine, it’s
> all good: 👍
>
> $ "/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
>
>
> However, the same thing *without* KVM (as happens within ‘guix system
> vm’) reproduces the “Bad ram pointer” issue:
>
> $ "/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
>
>
> Good news: I found a workaround!  Just use the x86_64 emulator:

Done in 5e0ae2684615b6d10751390420e7db296785112b!

Ludo’.




^ permalink raw reply	[flat|nested] 2+ messages in thread

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2023-09-18 21:44 ` Ludovic Courtès

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