> Possibly not, but I'd like to be able to say with confidence that > running a PARAVIRT kernel on bare hardware has no performance loss > compared to running a !PARAVIRT kernel. There's the case of small > instruction sequences which have been replaced with calls (such as > sti/cli/push;popf/etc),
My guess is that most critical pushf/popf are in spin_lock_irqsave(). It would be possible to special case that one -- inline it -- and use out of line versions for all the others. -Andi _______________________________________________ Virtualization mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/virtualization
