On Thu, Feb 02, 2012 at 07:23:39PM +0200, Avi Kivity wrote: > On 02/02/2012 07:01 PM, Paul E. McKenney wrote: > > > > > > It's not called (since the cpu is not idle). Instead we call > > > rcu_virt_note_context_switch(). > > > > Frederic's work checks to see if there is only one runnable user task > > on a given CPU. If there is only one, then the scheduling-clock interrupt > > is turned off for that CPU, and RCU is told to ignore it while it is > > executing in user space. Not sure whether this covers KVM guests. > > Conceptually it's the same. Maybe it needs adjustments, since kvm > enters a guest in a different way than the kernel exits to userspace. > > > In any case, this is not yet in mainline. > > Let me know when it's in, and I'll have a look. Could you please touch base with Frederic Weisbecker to make sure that what he is doing works for you? Thanx, Paul -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>