"Beyond Stupid" Paranoid L1d Cache Flushing Looks Like It Will Try Again For Linux 5.15

The work going on for over a year to optionally flush the L1 data cache on context switching is going to try again for the next kernel cycle as an opt-in feature for select tasks. This was the feature rejected last year by Linus Torvalds that went on to "beyond stupid" and other concerns about it when it was trying to be mainlined originally...