[kde] [Bug 504423] New: plasmaworkspace/freespacenotifier: Alerts about cache partititions which are full "by design"

[Oliver Freyermuth]

https://bugs.kde.org/show_bug.cgi?id=504423

            Bug ID: 504423
           Summary: plasmaworkspace/freespacenotifier: Alerts about cache
                    partititions which are full "by design"
    Classification: I don't know
           Product: kde
      Version First unspecified
       Reported In:
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: o.freyermuth at googlemail.com
  Target Milestone: ---

SUMMARY
As of:
https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/5337
the freespacenotifier will alert users about any mounted partitions. This is
notably anger-inducing for cache partitions. For example, we have dedicated
partitions (/var/cache/fscache and /var/cache/cvmfs) which are used for the
kernel's fscache functionality for network filesystems (managed by cachefilesd
in userspace) and for CVMFSs cache (CernVM-FS). 
These partitions are "full by design", and a non-admin user can not even clean
them up. As their fill level varies with culling, I expect periodic nagging
warnings for all users. 

STEPS TO REPRODUCE
1. Use a system with a dedicated cache partition and let it fill up. 

OBSERVED RESULT
See warnings come and go as caches are filled and culled. 

EXPECTED RESULT
No warnings for cache partitions. 

ADDITIONAL INFORMATION
It would be great if such cache partitions which are irrelevant for users could
be silenced. One idea could be to ignore partitions with a CACHEDIR.TAG marker
in the top level ( https://bford.info/cachedir/ ), or allow the administrator /
distribution to exclude a list of partitions via a configuration knob.

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