On 02/07/2012 06:29 PM, Jan Kiszka wrote: > >>> > >> > >> Isn't there another level in between just scheduling and full syscall > >> return if the user return notifier has some real work to do? > > > > Depends on whether you're scheduling a kthread or a userspace process, no? > > If > > Kthreads can't return, of course. User space threads /may/ do so. And > then there needs to be a differences between host and guest in the > tracked MSRs.
Right. Until we randomize kernel virtual addresses (what happened to that?) and then there will always be a difference, even if you run the same kernel in the host and guest. > I think to recall it's a question of another few hundred > cycles. Right. -- error compiling committee.c: too many arguments to function
