On Wed, Jan 19, 2011 at 10:42:39PM +0530, Srivatsa Vaddagiri wrote: > Add two hypercalls to KVM hypervisor to support pv-ticketlocks. > > KVM_HC_WAIT_FOR_KICK blocks the calling vcpu until another vcpu kicks it or it > is woken up because of an event like interrupt.
One possibility is to extend this hypercall to do a directed yield as well, which needs some more thought. Another issue that needs to be resolved with pv-ticketlocks is the impact on intra-VM fairness. A guest experiencing heavy contention can keep yielding cpu, allowing other VMs to get more time than they deserve. - vatsa _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linux-foundation.org/mailman/listinfo/virtualization
