On Thu, Feb 02, 2012 at 11:34:25AM +0200, Avi Kivity wrote: > On 02/01/2012 10:13 PM, Paul E. McKenney wrote: > > > > > > Could we also apply the same approach to processors busy doing > > > computational work? In that case the OS is also not needed. Interrupting > > > these activities is impacting on performance and latency. > > > > Yep, that is in fact what Frederic's dyntick-idle userspace work does. > > Running in a guest is a special case of running in userspace, so we'd > need to extend this work to kvm as well. As long as rcu_idle_enter() is called at the appropriate time, RCU will happily ignore the CPU. ;-) 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>