Linus Torvalds Comments On STIBP & He’s Not Happy – STIBP Default Will End Up Changing

It turns out that Linus Torvalds himself was even taken by surprise with the performance hit we’ve outlined on Linux 4.20 as a result of STIBP “Single Thread Indirect Branch Predictors” introduction as well as back-porting already to stable series for cross-hyperthread Spectre V2 protection. He doesn’t want this enabled in full by default…

Source: Phoronix