2014-05-15 17:50+0800, Li, Zhen-Hua: > This patch is trying to increase the maximum supported vcpu number. > > There has been big system supporting more than 256 logical CPUs, and vmware > can also support guest system with more than logical 256 CPUs. So kvm should > also increase the maximum supported cpu number.
How did it work? KVM lapic does not handle more more than 256 [1] at the moment, so additional VCPUs had to wraparound ... --- 1: "struct kvm_apic_map" has "struct kvm_lapic *phys_map[256]" and we are using "& 0xff" when dealing with it, too. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
