kernel not configured for semaphore

[pccobbler]

Maybe half of the time I see a page of messages that include "kernel not configured for semaphore ... System V IPC ... not using udev synchronization code" at shutdown, and the rest of the time I see only one line of the message. The messages go by so fast that I cannot read the rest and it's possible I made an error in what I posted here. In the old days, I could read system logs as plain text, but now I need to use journalctl, I think, but I do not see the semaphore messages in that list. This is F25 Cinnamon.

The hardware is old: Intel DH67 board, Sandy Bridge processor, and Crucial SSD. No wireless or graphics cards are installed, but it does have a Creative sound card. I tried Korora and saw the same messages.

I have two questions:

1) If the messages are not available via journalctl, how do I view them?

2) I realize I have not given the entire message, but does anyone have a suggestion as to what the problem could be?

[nsnbm]

For plain text logs you could check out /var/log/messages. You may need to install rsyslog which writes to /var/log/messages. In my case, /var/log/messages records unmountings, deactivations, removings, stoppings and more until the system shuts down. I don't have any messages currently on semaphores, presumably because there are no issues on that score. journalctl and rsyslog show very similar messages on my system.

[nobody]

https://bugzilla.redhat.com/show_bug.cgi?id=1359352
https://bugzilla.redhat.com/show_bug.cgi?id=1385432

https://fedoraproject.org/wiki/Fedor...ugs_and_issues (1385432)

Interesting bug... Connected with encrypted LVM file system. Also present in Fedora 26.

The same thing here, on Fedora 26. It’s not just aesthetically poor, but it prevents the computer from shutting down at random, which is a problem an order of magnitude more serious. I’m using Btrfs on LVM on LUKS on LVM, which also qualifies as “encrypted LVM”.

_nobody_

[pccobbler]

Thanks to both nsnbm and nobody for their assistance.

/var/log/messages does not contain the semaphore messages, which is strange because it seems to include every other startup and shutdown message.

I saw the redhat threads after I posted, so this is an old problem. Still in F26? That's not good. I have spare time, so I'm going to wipe the drive and reinstall and not use LVM, even though I was not using encryption.

[pccobbler]

nobody is correct, it has to do with LVM partitions. I rebuilt my system with standard partitions and the error message no longer appears.

As usual, the Fedora community is great.

[nobody]

As usual, the Fedora community is great.

https://bugzilla.redhat.com/show_bug.cgi?id=1385432#c47

niemand 2017-06-08 07:06:09 EDT
Hello to all,

Here is the proof that this bug has everything to do with encrypted LVM (Fedora 25):
[SOLVED] kernel not configured for semaphore
http://www.forums.fedoraforum.org/showthread.php?t=314465

Lukas (Vrabec/Sparrow),

Could you, please, explain to us the fix you did to correct this bug? Or point to it somewhere to the kernel/selinux policy git patch fixing it? :-)

Thank you in advance,
_nobody_

_nobody_

[dd_wizard]

The bug report points to this bodhi entry, which points to the new package in koji. I'm downloading and installing it now.

dd_wizard

[nobody]

The bug report points to this bodhi entry, which points to the new package in koji. I'm downloading and installing it now.

dd_wizard

Information for building: selinux-policy-3.13.1-225.18.fc25!

Changelog * Thu Jun 08 2017 Lukas Vrabec <lvrabec@redhat.com> - 3.13.1-225.18
- Add a boolean to enable the use of dac_override
- Add support for userns for sandbox domains
- Allow zabbix_t to kill zabbix_script_t processes
- Allow kdumpgui to read removable disk device
- Allow virtlogd_t to execute itself
- Allow keepalived to read/write usermodehelper state
- Allow named_t to bind on udp 4321 port
- Fix interface tlp_manage_pid_files()
- Allow collectd domain read lvm config files. BZ(1459097)
- Allow abrt_dump_oops_t to execute bin_t
- udev wants this when unconfined disabled
- Hide broken symptoms when machine is configured with network bounding.

Seems that one (patch) in RED fixes these problems.

_nobody_

[nobody]

For Fedora 26, the (?/potential) solution: https://bugzilla.redhat.com/show_bug.cgi?id=1322625#c53

Fedora Update System 2017-06-08 07:10:57 EDT
selinux-policy-3.13.1-257.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/upda...017-6a43388229

For Fedora 25, the (?/potential) solution: https://bugzilla.redhat.com/show_bug.cgi?id=1385432#c48

Fedora Update System 2017-06-08 07:30:00 EDT
selinux-policy-3.13.1-225.18.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/upda...017-45ca9bfcb6

_nobody_

[nobody]

nobody is correct, it has to do with LVM partitions. I rebuilt my system with standard partitions and the error message no longer appears.

Indeed, here is the new report, AFTER selinux-policy.noarch 3.13.1-225.18.fc25 @updates-testing:

I just provided feedback on the bodhi website. Copying here just in case.

On a lenovo thinkpad x201, no encryption on the LVM groups, the "Kernel not configured for semaphores (System V IPC)" can still be seen when shutting down.

Currently running Fedora 25 xfce spin.

Last metadata expiration check: 9:14:19 ago on Sat Jun 10 21:53:09 2017.
Installed Packages selinux-policy.noarch 3.13.1-225.18.fc25 @updates-testing

NOT solved (period)

_nobody_

[syquus]

Just to confirm that I'm having the same errors (very annoying on shutdown) with:
· FC 26
· Kernel 4.12.11-300
· LVM encrypted partitions.
· selinux-policy-3.13.1-260.8.fc26.noarch

Still NOT solved