On 11/28/2017 04:12 AM, Christian König wrote: > > > How about the attached patch? It limits the newly added MMIO space to > the upper 256GB of the address space. That should still be enough for > most devices, but we avoid both issues with Xen dom0 as most likely > problems with memory hotplug as well. It certainly makes the problem to be less likely so I guess we could do this for now. Thanks. -boris