25 Jun
2025
25 Jun
'25
8 a.m.
(cc: Christian Brauner>
Since 6.15.4-rc1 I noticed that some KDE apps (kded6, kate (the text editor)) started going into a tailspin with 100% per-process CPU.
The symptom is 100% reproducible: open a new file with kate, save empty file, make changes, save, watch CPU go 100%. perf top shows copy_to_user running wild.
First I tried to reproduce on 6.15.3 - no problem, everything works fine.
After checking the list of patches for 6.15.4 I reverted the anon_inode series (all 3 for the first attempt) and the problem is gone.
Will try to reduce further & can gladly try additional fixes, but for now I'd say these patches are not yet suitable for stable.
thanks Holger