Re: [PATCH 6.15 000/588] 6.15.4-rc2 review

[Holger Hoffstätte]

(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