Messages in this thread | | | Date | Thu, 02 Feb 2012 19:23:39 +0200 | From | Avi Kivity <> | Subject | Re: [v7 0/8] Reduce cross CPU IPI interference |
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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.
-- error compiling committee.c: too many arguments to function
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