GNU bug report logs - #76540
Hang on reboot in Guix system

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From: dannym <at> friendly-machines.com
To: 76540 <at> debbugs.gnu.org, ludo <at> gnu.org
Subject: bug#76540: Hang on reboot in Guix system
Date: Tue, 25 Feb 2025 09:06:00 +0100

Hi,

when using a Guix system, it hangs on reboot pretty much every time.

I've tracked it down (using the magic sysrq key) to two processes being 
left over: shepherd(obviously) and virtlogd.

The interesting part of the system config is:

     (service virtlog-service-type
              (virtlog-configuration
               (max-clients 10)))
     (service libvirt-service-type
              (libvirt-configuration
               (keepalive-interval 50)
               (keepalive-count 50)
               (unix-sock-group "libvirt")
               (tls-port "16514")))

Killing virtlogd using sysrq e makes shepherd immediately respawn it 
(!).

Isn't there some shepherd state that says "I'm supposed to shut down, 
don't keep respawning services" ?

For reference, the important sysrq keys are:
  sysrq 9       to increase the log level to 9. After that, you will see 
a line printed every second with the process ids of the processes that 
are still there
  sysrq e       to send SIGTERM to all processes
  sysrq i       to send SIGKILL to all processes
  sysrq t       to see all "tasks"

guix b319256
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: b31925665d07acbb049adf702066b95af2b58b4d

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