SUMMARY STEPS TO REPRODUCE 1. Open a root-owned directory in Dolphin with the "Open as Admin" option. 2. Open a regular directory in another instance of Dolphin. 3. Copy a file from the regular directory to the root-owned. OBSERVED RESULT The file is copied at the consistent speed of 2.0 MiB/s. EXPECTED RESULT The file is copied at least 1000 times faster. SOFTWARE/OS VERSIONS OS: Fedora 41 x64 Linux kernel: 6.12.9-200.fc41.x86_64 (64-bit) KDE Plasma Version: 6.2.5 KDE Frameworks Version: 6.10.0 Qt Version: 6.8.1 ADDITIONAL INFORMATION I have the Samsung 990 pro SSD. The files are copied between directories on this drive. I'm using LUKS.
Do you observe the same slow down for non-root owned directories on the same filesystem and physical drive?
I haven't experienced this problem during regular non-root usage. I've managed to boil the problem down a little bit more. It doesn't matter who owns the directory, it's only about copying a file from a non-root Dolphin instance to a root instance. I did a few more experiments: 1. I tried copying a file from a non-root owned directory opened as non-root to another non-root owned directory opened as root. It was slow. 2. I tried copying it back. It was fast. 3. I tried the same, but with both directories opened as root. It was fast. 4. I tried copying a file using a single instance of Dolphin opened as root. It was fast.
(In reply to fanzhuyifan from comment #1) > Do you observe the same slow down for non-root owned directories on the same > filesystem and physical drive? Hi fanzhuyifan@gmail.com, are your questions answered? Do you have more? Should we remove the "NEEDSINFO WAITINGFORINFO" status?
Note: "Open as Admin" requires that kio-admin be installed I am able to reproduce this on git-master using the original testing steps I chose a 400MiB file Copying the file from ~/ to /root/temp : 4-5 MiB/s. This was taking a while Copying the same file from ~/ to ~/temp was completed immediately