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This patch implements PV send_IPI method to >> reduce the number of vmexits. It won't reduce the number of VM-exits; in fact, it may increase them on CPUs that support IPI virtualization. With IPI virtualization enabled, *unicast* and physical-addressing IPIs won't cause a VM-exit. Instead, the microcode posts interrupts directly to the target vCPU. The PV version always causes a VM-exit. >> >> Signed-off-by: Jason Wang >> Tested-by: Cindy Lu > >I think a question here is are we able to see performance improvement >in any kind of setup? It may result in a negative performance impact. > >Thanks > >