On Thu, 2007-07-12 at 10:47 +0300, Avi Kivity wrote: > Rusty Russell wrote: > But what kind of daredevil coder would propose such a thing?) > > Ah, so this is why you want ->next in preempt hooks. Well, my plan for > this sort of thing (for kvm has the same issues with the *STAR family of > msrs) is to add a new hook on switching from kernel to userspace, and > swap those msrs there. This allows not only the guest1->guest2 case to > be optimized, but also guest->kthread->guest, which is a common pattern > with I/O (and very common with -rt, which runs interrupts in threads). Adding instructions to the syscall path is not going to make you popular. But if you do it, I'll use it 8) Thanks, Rusty. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
