Messages in this thread | | | Date | Thu, 2 Feb 2012 07:34:37 -0800 | From | "Paul E. McKenney" <> | Subject | Re: [v7 0/8] Reduce cross CPU IPI interference |
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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
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