On Mon, Oct 12, 2020 at 11:29 AM Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > > On 12/10/20 20:17, Nadav Amit wrote: > >> > >> KVM clearly doesn't adhere to the architectural specification. I don't > >> know what is wrong with your Broadwell machine. > > Are you saying that the test is expected to fail on KVM? And that Sean’s > > failures are expected? > > > > It's not expected to fail, but it's apparently broken. KVM uses a sloppy hrtimer to deliver the interrupt that emulates the VMX-preemption timer, so it can't possibly work all of the time. Much of the time, though, it gets lucky.
