On 14/04/2017 16:45, Jean Baptiste Guerraz wrote: > Thank you Radim for the answer! > > There are indeed some differences between those systems in KVM modules > parameters; I've updated the gist with all those details : > https://gist.github.com/jbguerraz/faef292b48b2d0106d8d96ba0ddd943c > > With a focus on differences between the two FC25 systems, we get : > - /sys/module/kvm_intel/parameters/enable_shadow_vmcs is set to Y on > the not working one > - /sys/module/kvm_intel/parameters/pml is set to Y on the not working one So one is Ivy Bridge and one is Broadwell I think. That's good to know because both have the same interrupt injection path. What version of the kernel is this? Does loading kvm_intel with pml=0 fix it? (Shadow VMCS is not an issue because it's only used for nested virtualization). Paolo
