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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
