[systemd-devel] Antw: [EXT] Re: Q: "systemd[1]: var-tmp-AP_0x6tWaHS.mount: Succeeded."

[Ulrich Windl]

>>> Mantas Mikulenas <grawity at gmail.com> schrieb am 28.01.2022 um 10:27 in
Nachricht
<CAPWNY8U8wQxPh2enZ-WTnaRjFoPUt8SpeFMUiqX8x+rAet9csg at mail.gmail.com>:
> On Fri, Jan 28, 2022 at 10:50 AM Ulrich Windl <
> Ulrich.Windl at rz.uni-regensburg.de> wrote:
> 
>> Hi!
>>
>> When upgrading SLES15 to SP3, a newer version of systemd was installed
>> (246.16+suse.191.g3850086c65).
>> Since then I see new journal messages like these that I cannot associate
>> with a unit:
>>
>> Jan 27 09:29:30 h16 systemd[1]: var-tmp-AP_0xC5KDJP.mount: Succeeded.
>> Jan 27 09:29:30 h16 systemd[22591]: var-tmp-AP_0xC5KDJP.mount: Succeeded.
>>
>> Where do these messages originate from, and couldn't they be improved? Or
>> is it some debug-leftover?
>> I do not see corresponding names in /var/tmp.
>>
> 
> If I understand correctly, the messages indicate that the filesystem was
> *unmounted*, and the same program which did mounting/unmounting immediately
> cleaned up the mountpoint as well.
> 
> (systemd reacts to external mounts as those also contribute to
> dependencies.)
> 
> If OpenSuSE has the kernel audit subsystem enabled, try using `auditctl` to
> monitor a) what process executes mount-related syscalls, b) what process
> creates directories under /var/tmp.

Thanks,

probably these messages are related to mounting a virtual CD, as nearby are
these messages:
Jan 27 09:29:29 h16 kernel: ISO 9660 Extensions: Microsoft Joliet Level 3
Jan 27 09:29:29 h16 kernel: ISO 9660 Extensions: RRIP_1991A
Jan 27 09:29:30 h16 systemd[1]: var-tmp-AP_0xC5KDJP.mount: Succeeded.
Jan 27 09:29:30 h16 systemd[22591]: var-tmp-AP_0xC5KDJP.mount: Succeeded.
Jan 27 09:29:30 h16 kernel: ISO 9660 Extensions: Microsoft Joliet Level 3
Jan 27 09:29:30 h16 kernel: ISO 9660 Extensions: RRIP_1991A
Jan 27 09:29:31 h16 systemd[22591]: var-tmp-AP_0x6tWaHS.mount: Succeeded.
Jan 27 09:29:31 h16 systemd[1]: var-tmp-AP_0x6tWaHS.mount: Succeeded.

Still I wonder what this is all about (systemd finding a CD, mounting it, just
to find out that no-one needs it?)...

> 
> -- 
> Mantas Mikulėnas