>>> On 18.10.16 at 16:14, <tianyu....@intel.com> wrote: > 1.1 Enable more than 255 vcpu support > HPC cloud service requires VM provides high performance parallel > computing and we hope to create a huge VM with >255 vcpu on one machine > to meet such requirement.Ping each vcpus on separated pcpus. More than > 255 vcpus support requires X2APIC and Linux disables X2APIC mode if > there is no interrupt remapping function which is present by vIOMMU. > Interrupt remapping function helps to deliver interrupt to #vcpu >255. > So we need to add vIOMMU before enabling >255 vcpus.
I continue to dislike this completely neglecting that we can't even have >128 vCPU-s at present. Once again - there's other work to be done prior to lack of vIOMMU becoming the limiting factor. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel