Hi, I've filed https://bugzilla.kernel.org/show_bug.cgi?id=199939 but am unsure if anyone is looking at it. Essentially we have a case of guests being able to run under 4.9 but crashing and burining under 4.16/4.17. They die just into the kernel startup sequence, as near as I can tell. All else (QEMU version and config) is static on the host. The difference is the kernel version it is booted into. The host CPU is AMD EPYC 7281. There is a screenshot of the error and kernel configs in the bug. If there is more info that is required please shout and I'll do what I can ASAP. We've got some brand new servers that are gathering dust as, with 4.9, the network card drivers are unstable (but they work fine with 4.17 :/). AP
