[shepherd] Attempt to suspend fiber within continuation barrier

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2 participants
  • Ludovic Courtès
  • Maxim Cournoyer
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unassigned
Submitted by
Maxim Cournoyer
Severity
important

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M
M
Maxim Cournoyer wrote on 19 Mar 04:52 -0700
(name . bug-guix)(address . bug-guix@gnu.org)
874izpteyy.fsf@gmail.com
Hi,

Seen on Berlin:

Toggle snippet (5 lines)
$ sudo herd schedule mcron 1000 | grep mumi
herd: error: exception caught while executing 'schedule' on service 'mcron':
Attempt to suspend fiber within continuation barrier

--
Thanks,
Maxim
M
M
Maxim Cournoyer wrote on 19 Mar 09:41 -0700
(address . 77115@debbugs.gnu.org)
87o6xxq8fi.fsf@gmail.com
tag 77115 + important
quit

Hi,

Maxim Cournoyer <maxim.cournoyer@gmail.com> writes:

Toggle quote (8 lines)
> Hi,
>
> Seen on Berlin:
>
> $ sudo herd schedule mcron 1000 | grep mumi
> herd: error: exception caught while executing 'schedule' on service 'mcron':
> Attempt to suspend fiber within continuation barrier

Another data point; when using virt-manager (which uses libvirt+qemu) to
run my own operating system definition, it triggers a similar hang/crash
in Shepherd during the boot; see the screenshot below. I haven't yet
isolated which service causes it.
Attachment: Screenshot_guix-system-latest_2025-03-20_00:26:07.png
--
Thanks,
Maxim
M
M
Maxim Cournoyer wrote on 19 Mar 09:42 -0700
87msdhq8f5.fsf@gmail.com
tag 77115 + important
quit

Hi,

Maxim Cournoyer <maxim.cournoyer@gmail.com> writes:

Toggle quote (8 lines)
> Hi,
>
> Seen on Berlin:
>
> $ sudo herd schedule mcron 1000 | grep mumi
> herd: error: exception caught while executing 'schedule' on service 'mcron':
> Attempt to suspend fiber within continuation barrier

Another data point; when using virt-manager (which uses libvirt+qemu) to
run my own operating system definition, it triggers a similar hang/crash
in Shepherd during the boot; see the screenshot below. I haven't yet
isolated which service causes it.
Attachment: Screenshot_guix-system-latest_2025-03-20_00:26:07.png
--
Thanks,
Maxim
L
L
Ludovic Courtès wrote on 19 Mar 11:13 -0700
(name . Maxim Cournoyer)(address . maxim.cournoyer@gmail.com)(address . 77115@debbugs.gnu.org)
87jz8kga86.fsf@gnu.org
Hi,

Maxim Cournoyer <maxim.cournoyer@gmail.com> skribis:

Toggle quote (4 lines)
> $ sudo herd schedule mcron 1000 | grep mumi
> herd: error: exception caught while executing 'schedule' on service 'mcron':
> Attempt to suspend fiber within continuation barrier

(For the record, that’s Shepherd 1.0.1 currently running on berlin.)

Can you reproduce it in a VM? With 1.0.2 vs. 1.0.3?

On my laptop, which runs 1.0.3ish, I can’t seem to hit this:

Toggle snippet (4 lines)
$ sudo herd schedule mcron 20000|wc -l
60000

Toggle quote (5 lines)
> Another data point; when using virt-manager (which uses libvirt+qemu) to
> run my own operating system definition, it triggers a similar hang/crash
> in Shepherd during the boot; see the screenshot below. I haven't yet
> isolated which service causes it.

Do you have a reproducer for this one?

This looks a lot like what was fixed by
which is in 1.0.3.

Thanks,
Ludo’.
M
M
Maxim Cournoyer wrote on 19 Mar 20:11 -0700
control message for bug #77115
(address . control@debbugs.gnu.org)
8734f8qtts.fsf@gmail.com
severity 77115 important
quit
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