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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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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: dannym@HIDDEN
Subject: bug#76540: Acknowledgement (Hang on reboot in Guix system)
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Date: Tue, 25 Feb 2025 08:14:02 +0000

Thank you for filing a new bug report with debbugs.gnu.org.

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--=20
76540: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D76540
GNU Bug Tracking System
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Subject: bug#76540: Hang on reboot in Guix system
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Hi,

This has been resolved - see https://issues.guix.gnu.org/76338#17 for
for information.

Regards,
Ashvith




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To: Danny Milosavljevic <dannym@HIDDEN>
Subject: bug#76540: closed (Hang on reboot in Guix system)
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Your message dated Sun, 30 Mar 2025 23:52:55 +0200
with message-id <87ldsmtcco.fsf@HIDDEN>
and subject line can confirm hang on reboot is gone
has caused the debbugs.gnu.org bug report #76540,
regarding Hang on reboot in Guix system
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs@HIDDEN)


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76540: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D76540
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From: dannym@HIDDEN
To: bug-guix@HIDDEN, =?UTF-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
Subject: Hang on reboot in Guix system
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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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From: Danny Milosavljevic <dannym@HIDDEN>
To: 76540-done <at> debbugs.gnu.org
Subject: can confirm hang on reboot is gone
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Hi,

I can confirm that shepherd hang on reboot is gone.

(Now I regularily get fsck running after reboot--but I guess that's a
different bug)


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To: dannym@HIDDEN
Subject: bug#76540: closed (can confirm hang on reboot is gone)
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Your bug report

#76540: Hang on reboot in Guix system

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 76540 <at> debbugs.gnu.org.

--=20
76540: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D76540
GNU Bug Tracking System
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To: 76540-done <at> debbugs.gnu.org
Subject: can confirm hang on reboot is gone
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Hi,

I can confirm that shepherd hang on reboot is gone.

(Now I regularily get fsck running after reboot--but I guess that's a
different bug)


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Date: Tue, 25 Feb 2025 09:06:00 +0100
From: dannym@HIDDEN
To: bug-guix@HIDDEN, =?UTF-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
Subject: Hang on reboot in Guix system
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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



------------=_1743371642-31527-1--


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Dear Danny,

the fsck bug after reboot is tracked here: #77086
https://issues.guix.gnu.org/77086

We are still looking for reproducers, could you please report your 
issues in the thread?

Thanks
Sebastian





Last modified: Mon, 31 Mar 2025 18:00:01 UTC

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