On Wed, Jul 06, 2016 at 02:46:34PM +0800, Wanpeng Li wrote: > > SO it's easy for ppc to implement such interface. Note that yield_count is > > set by powerVM/KVM. > > and only pSeries can run a guest for now. :) > > > > I also review x86 related code, looks like we need add one hyer-call to get > > such vcpu preemption info? > > There is no such stuff to record lock holder in x86 kvm, maybe we > don't need to depend on PLE handler algorithm to guess it if we can > know lock holder vCPU directly. x86/kvm has vcpu->preempted to indicate if a vcpu is currently preempted or not. I'm just not sure if that is visible to the guest or how to make it so. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
