The problem was fixed upstream in Linux-libre 5.10.21, and presumably also in 5.11.4, so I'm closing this bug now.
Mark
- bug#46981: Severe Emacs shell mode performance regressi... Mark H Weaver
- bug#46981: Severe Emacs shell mode performance reg... Mark H Weaver
- bug#46981: Severe Emacs shell mode performance... Mark H Weaver
- bug#46981: Severe Emacs shell mode performance... Bengt Richter
- bug#46981: Severe Emacs shell mode performance... Christopher Baines
- bug#46981: Severe Emacs shell mode perform... Mark H Weaver
- bug#46981: Severe Emacs shell mode per... Ludovic Courtès
