Created attachment 180294 [details] reproducer script SUMMARY i have a program running which uses lots (>20k) loop devices. after starting the program the desktop does not work anymore. switching windows with alt-tab works like before. but clicking the "K" button is ignored. top shows that: (for ~10k loop devices) kded6 uses 100% cpu and the ram usage increases sharply (>3GB) plasmashell goes to 200% cpu and uses more ram (>5GB) after some time (~15m) it becomes responsive again. but big ram usage continues i attach a reduced testcase script it attaches loop devices and should very easily show the problem STEPS TO REPRODUCE 1. run the attached script or open lots of loop devices OBSERVED RESULT kde is not responsive any more EXPECTED RESULT attaching of loop devices should not disturb kde in any kind SOFTWARE/OS VERSIONS Linux/KDE Plasma: 6.3.4 KDE Plasma Version: 6.3.4 KDE Frameworks Version: 6.12.0 Qt Version: 6.9.0 ADDITIONAL INFORMATION
Created attachment 180295 [details] top memory usage
This is very far outside of the realm of normal activity. You may have uncovered a legitimate performance issue, but regardless, I would recommend changing the program to not do this anymore.