2017-11-22 16:52+0100, Marc Haber: > On Wed, Nov 22, 2017 at 04:04:42PM +0100, 王金浦 wrote: > > So all guest kernels are 4.14, or also other older kernel? > > Guest kernels are also 4.14, but the issue disappears when the host is > downgraded to an older kernel. I therefore reckoned that the guest > kernel doesn't matter, but that was before I saw the trace in the log. The two most suspicious patches since 4.13 (which I assume works) are 664f8e26b00c ("KVM: X86: Fix loss of exception which has not yet been injected") and 9a6e7c39810e ("KVM: async_pf: Fix #DF due to inject "Page not Present" and "Page Ready" exceptions simultaneously") please try reverting them to see if it helps, thanks.