Hi, with our home directories mounted as cifs shares, we are hit by this issue quite hard: People can't login (because sddm is missing the home directory) or it takes ages (or ~20 min if you are patient) until the KDE plasma desktop gets usable. It doesn't seem to be always triggered, but in cases it does, it's rather fatal. I remember 'cifs_flush_folio' from a quick look at the logs …
After booting with the 6.1.0-16 kernel, systems are back to normal. If any more details are needed to fix the issue, just let me know. Best regards, Andi