Let us suppose we are talking about a uni processor system. Do we change cr3 page directory control register when a new process is scheduled to run on the CPU. thanks. George -- To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs